Columbia University says it has expelled or suspended some students who took over a campus building during pro-Palestinian protests last spring, and had temporarily revoked the diplomas of some students who have since graduated.

The university said its judicial board had issued its sanctions against dozens of students who occupied Hamilton Hall.

In February, the House Committee on Education and Workforce sent a letter to Columbia’s interim president, Katrina Armstrong, and Columbia’s board chairs, David Greenwald and Claire Shipman, listing “numerous antisemitic incidents” that it said had taken place in the last two academic years.

Former Columbia University student activist Mahmoud Khalil remains in an immigration detention center in Louisiana. Protesters nationwide are calling for his release, saying the federal government is violating his First Amendment rights by seeking to deport him amid the White House's crackdown on students and alleged "agitators" protesting Israel's war with the terror group Hamas.

Columbia University says it has expelled or suspended some students who seized building during pro-Palestinian protest

The arrest and threatened deportation of a student activist at Columbia University is a threat to free speech on campus and across the U.S., says professor Michael Thaddeus.