Some pro-Palestinian demonstrators returned to the campus of Columbia University, but this time, they say, to protest the treatment of one of their own.

Pro-Palestinian activist and former Columbia graduate student Mahmoud Khalil has been in the custody of federal immigration officials for nearly a month.

Between four to eight people chained themselves to the exterior gates of Columbia at various locations Wednesday.

A spokesperson for the university said at one point they refused orders to disperse near St. Paul’s Chapel on Amsterdam Avenue and their chains were cut by public safety officers before being escorted off-campus.

After regrouping at Amsterdam Avenue and 116th Street, demonstrators were again ordered to leave by NYPD officers.

Demonstrators then re-assembled on Broadway and 117th Street.

“A member of our community, Mahmoud Khalil, was detained by [U.S. Immigration and Customs Enforcement] and has been in detention for the last few weeks because our university, our trustees directly collaborated and gave over his name,” Columbia junior, Shay Orentlicher, said. “We want to know which trustee did this so we can hold them accountable for betraying one of the most basic functions of this university, which was to protect its students,” Aharon Dardik, who is also a third-year student at the university, said.

The protesters said they have reason to believe Khalil’s arrest was made possible because of cooperation between federal immigration and university officials.

“We also know that ICE had information they only could have gotten through the university, meaning that members of our administration turned over his private student information to ICE,” protester Marie Adele Grosso said.

She could not offer concrete evidence of this allegation, but told NY1 that a university trustee basically admitted as much during a large meeting with students.

NY1 asked Columbia officials if the allegations were true. In a statement, a spokesperson wrote, “No member of Columbia leadership has ever requested the presence of U.S. Immigration and Customs Enforcement (ICE) agents on or near campus to target students.”

The protesters said they’re not buying it and won’t end their demonstration until they’re told what university official provided Khalil’s information to ICE officials.

Recently, Columbia agreed to a number of policy changes demanded by the Trump administration as a condition of restoring $400 million in government funding.

This latest protest comes less than a week after the Columbia University’s interim president resigned and the university’s trustees appointed the co-chair of their board, former news reporter and anchor Claire Shipman, as acting president while the search for a permanent replacement continues.