NEW YORK 鈥 Columbia University expelled or suspended some聽聽during pro-Palestinian protests last spring and temporarily revoked the diplomas of others who since graduated, officials said Thursday.
The university said in a campuswide email that a judicial board brought a range of sanctions against students who occupied Hamilton Hall last spring to protest the war in Gaza.
Columbia did not provide a breakdown of how many students were expelled, were suspended or had their degrees revoked, but said the outcomes were based on an 鈥渆valuation of the severity of behaviors.鈥
The culmination of the monthslong investigative process comes as the university is reeling from the arrest of a well-known Palestinian campus activist,聽, by federal immigration authorities last Saturday. President Donald Trump has said the arrest would be the 鈥渇irst of many鈥 such detentions.
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At the same time, the Trump administration stripped the university of聽聽in federal funds over what it calls a failure to combat campus antisemitism.
Congressional Republicans pointed specifically to a failure to discipline students involved in the Hamilton Hall seizure as proof of inaction by the university.
The building occupation followed a聽聽that inspired a wave of similar demonstrations at college campuses across the country.
On April 30, a smaller group of students and their allies barricaded themselves inside Hamilton Hall with furniture and padlocks in a major escalation of campus protests.

Students with the Gaza Solidarity Encampment block the entrance of Hamilton Hall on April 30 at Columbia University聽in New York after taking over the building.
At the request of university leaders, hundreds of New York police stormed onto campus the following night, arresting dozens of people involved in the occupation and the encampment.
At a court hearing in June, the Manhattan district attorney鈥檚 office said it would not pursue criminal charges for 31 of the 46 people initially arrested on trespassing charges inside the administration building.
However, the students still faced disciplinary hearings and possible expulsion from the university.
The final sanctions announced Thursday followed a lengthy process that involved hearings for each student led by the long-running University Judicial Board.
Some students who joined the encampment but did not participate in the building takeover learned they would not face further discipline beyond their previous suspensions.
鈥淲ith respect to other events taking place last spring, the UJB鈥檚 determinations recognized previously imposed disciplinary action,鈥 the university said in a statement.

Using a tactical vehicle April 30, New York City police enter an upper floor of Hamilton Hall on the Columbia University campus in New York, after protesters took over the building earlier in the day.
The disciplinary process drew scrutiny from House Republicans, who demanded university administrators turn over disciplinary records of students involved in campus protests or risk billions of dollars in federal funding.
On Thursday, Khalil and seven students identified by pseudonyms filed a lawsuit seeking to block a Congressional committee from obtaining such records for students at Columbia and Barnard College, a women's institution affiliated with Columbia.
Filed in federal court in Manhattan against the two schools, the Republican-led House Committee on Education and the Workforce and its chairman, Republican Rep. Tim Walberg of Michigan, the lawsuit seeks a permanent injunction barring Congress from forcing the schools to provide the records and the universities from complying.
Last month the committee sent a letter demanding that Columbia and Barnard provide the records or risk federal funding. The plaintiffs argue in the complaint that the committee is abusing its power in an attempt 鈥渢o chill and suppress speech and association based on the viewpoint expressed鈥 and the investigation 鈥渢hreatens to significantly infringe on First Amendment rights.鈥
In a statement emailed by a committee spokesperson, Walberg said, 鈥淭his lawsuit changes nothing.鈥

Pro-Palestinian protesters gather April 30 near a main gate at Columbia University in New York, just before city police officers cleared the area after protesters took over a building earlier in the day.
The information requested 鈥渋s critical to its consideration of legislation on this issue鈥 and necessary to 鈥渉old schools accountable for their failures to address rampant antisemitism on our college campuses,鈥 he added.
Barnard spokespeople did not immediately respond to emails seeking comment, and Columbia declined to discuss the pending litigation.
Separately, a聽聽has brought new cases against students 鈥 including Khalil 鈥 who expressed criticism of Israel, triggering alarm among free speech advocates. Khalil was not among the protesters accused of seizing Hamilton Hall.
The expulsion announcement drew praise from some faculty members, including Gil Zussman, chair of the electrical engineering department and member of Columbia鈥檚 Task Force on Antisemitism.
鈥淔inally demonstrating that breaking university rules has consequences is an important first step towards going back to the core missions of research and teaching,鈥 he said in a post on the social media platform X, formerly Twitter.
Gaza war protests ignite on US college campuses

A University of Southern California protester is detained by USC Department of Public Safety officers during a pro-Palestinian occupation at the campus' Alumni Park on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

Demonstrators chant at a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin, Texas. (Mikala Compton/Austin American-Statesman via AP)

Texas state troopers in riot gear try to break up a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin, Texas. (Jay Janner/Austin American-Statesman via AP)

A row of Palestinian flags are seen on the fence at the pro-Palestinians demonstration encampment at Columbia University in New York on Wednesday April 24, 2024. (AP Photo/Stefan Jeremiah)

State troopers try to break up a pro-Palestinian protest at the University of Texas Wednesday April 24, 2024, in Austin, Texas. Student protests over the Israel-Hamas war have popped up on an increasing number of college campuses following last week's arrest of more than 100 demonstrators at Columbia University. (Jay Janner/Austin American-Statesman via AP)

A demonstrator is restrained by police at a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin, Texas. (Ricardo B. Brazziell/Austin American-Statesman via AP)

State troopers on horses push back protesters during a pro-Palestinian protest at the University of Texas, Wednesday April 24, 2024, in Austin, Texas. (Mikala Compton/Austin American-Statesman via AP)

A Georgia State Patrol officer detains a protester on the campus of Emory University during a pro-Palestinian demonstration Thursday, April 25, 2024, in Atlanta. (AP Photo/Mike Stewart)

Georgia State Patrol officers detain a protester on the campus of Emory University during an pro-Palestinian demonstration Thursday, April 25, 2024, in Atlanta. (AP Photo/Mike Stewart)

Authorities detain a protester on the campus of Emory University during a pro-Palestinian demonstration, Thursday, April 25, 2024, in Atlanta. (AP Photo/Mike Stewart)

Protesters are cuffed after being detained on the campus of Emory University during a pro-Palestinian demonstration Thursday, April 25, 2024, in Atlanta. (AP Photo/Mike Stewart)

A police officer detains a protester on the campus of Emory Univeristy during an pro-Palestinian demonstration, Thursday, April 25, 2024, in Atlanta. (AP Photo/Mike Stewart)

Student protestors erected approximately 20 tents on Parrish Beach by Clothier Hall at Swarthmore College in Swarthmore, Pa. on Tuesday, April 23, 2024. (Monica Herndon/The Philadelphia Inquirer via AP)

A University of Southern California protester is detained by USC Department of Public Safety officers during a pro-Palestinian occupation at the campus' Alumni Park on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

A University of Southern California protester is detained by USC Department of Public Safety officers during a pro-Palestinian occupation at the campus' Alumni Park on Wednesday, April 24, 2024, in Los Angeles. (AP Photo/Richard Vogel)

University of Southern California protesters fight with University Public Safety officers as they try to remove tents at the campus' Alumni Park during a pro-Palestinian occupation on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

University of Southern California protesters carry a tent around Alumni Park on the University of Southern California to keep security from removing it during a pro-Palestinian occupation on Wednesday, April 24, 2024, in Los Angeles. (AP Photo/Richard Vogel)

University of Southern California protesters carry a tents around Alumni Park on the University of Southern California to keep security from removing them during a pro-Palestinian occupation on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

University of Southern California protesters carry a tents around Alumni Park on the campus of the University of Southern California to keep security from removing them during a pro-Palestinian occupation on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

A University of Southern California protester, right, confronts a University Public Safety officer at the campus' Alumni Park during a pro-Palestinian occupation on Wednesday, April 24, 2024, in Los Angeles. (AP Photo/Richard Vogel)

University of Southern California protesters push and shove University Public Safety officers as tempers get heated during a pro-Palestinian occupation on the University of Southern California campus Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

A woman is arrested at a pro-Palestinan protest at the University of Texas, Wednesday, April 24, 2024, in Austin, Texas. (Jay Janner/Austin American-Statesman via AP)

Texas state troopers in riot gear try to break up a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin, Texas. (Jay Janner/Austin American-Statesman via AP)

Signs are displayed on tents at the pro-Palestinian demonstration encampment at Columbia University in New York on Wednesday April 24, 2024. (AP Photo/Stefan Jeremiah)

People sit outside tents at the pro-Palestinian demonstration encampment at Columbia University in New York on Wednesday April 24, 2024. (AP Photo/Stefan Jeremiah)

A Palestinian flag is displayed at the pro-Palestinian demonstration encampment at Columbia University in New York on Wednesday April 24, 2024. (AP Photo/Stefan Jeremiah)

State troopers try to break up a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

Pro-Palestinian protesters face off with mounted state troopers at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

Students participate in a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

A pro-Palestinian protester walks past pro-Israel protesters at the University of Texas Wednesday April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

A woman raises a fist during a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

A woman is arrested at a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

Tents erected at the pro-Palestinian demonstration encampment at Columbia University in New York, on Wednesday, April 24, 2024. (AP Photo/Stefan Jeremiah)

University of Texas police officers arrest a man at a pro-Palestinian protest on campus, Wednesday April 24, 2024, in Austin, Texas. (Jay Janner/Austin American-Statesman via AP)

A makeshift camp supporting the Palestinians cause is staged on the UCLA campus, Thursday, April 25, 2024, in Los Angeles. (AP Photo/Jae C. Hong)

University of Southern California protester raises an anti war sign in Alumni Park on the campus of the University of Southern California during a pro-Palestinian occupation on Wednesday, April 24, 2024 in Los Angeles. (AP Photo/Richard Vogel)

Student protesters hold up sheets as others pray at the pro-Palestinian demonstration encampment at Columbia University in New York on Wednesday April 24, 2024. (AP Photo/Stefan Jeremiah)

A pro-Palestinian protester faces off with state troopers at the University of Texas Wednesday April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

Cally, a former UT student, faces off with a mounted state trooper at a pro-Palestinian protest at the University of Texas, Wednesday, April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

A woman is arrested at a pro-Palestinian protest at the University of Texas, Wednesday April 24, 2024, in Austin. (Jay Janner/Austin American-Statesman via AP)

New York police officers move towards an entrance to Columbia University, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Members of the New York Police Department strategic response team move towards an entrance to Columbia University, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Members of the New York Police Department strategic response team move towards an entrance to Columbia University, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Students watch from their residence hall windows as members of the New York Police Department strategic response team move towards an entrance to Columbia University, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Students with the Gaza Solidarity Encampment block the entrance of Hamilton Hall at Columbia University after taking over it on Tuesday, April 30, 2024 in New York. Columbia Students for Justice in Palestine called for mobilization close to midnight. Students have been occupying part of campus since April 17, calling for the university to divest from institutions that have ties to Israel. (Marco Postigo Storel via AP)

Members of the New York Police Department strategic response team escort protesters from Columbia University, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Members of the New York Police Department strategic response team load arrested protesters from Columbia University onto a bus, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

Members of the New York Police Department strategic response team load arrested protesters from Columbia University onto a bus, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)

A police bus loaded with protesters arrested at Columbia University departs an entrance to the campus on 114th Street, Tuesday, April 30, 2024, in New York. After entering the campus, a contingent of police officers approached Hamilton Hall, the administration building that student protesters began occupying in the morning. (AP Photo/Julius Motal)