Department of Homeland Security officials searched two dorm rooms at Columbia University, days after the immigration authorities arrested and moved to deport a pro-Palestinian activist and recent graduate of the university.

Columbia’s interim president, Katrina Armstrong, said in a note to students and staff late Thursday that the officials had presented federal search warrants for private areas of the university. She added that no one was detained and nothing was taken, and did not specify the target of the warrants.

“I am writing heartbroken to inform you that we had federal agents from the Department of Homeland Security (D.H.S.) in two university residences tonight,” Dr. Armstrong wrote. She added that Columbia made every effort to ensure the safety of its students, faculty and staff.

The search occurred after the Trump administration said that Columbia would have to make major changes in its student discipline and admissions processes before it would begin talks on reinstating $400 million in government grants and contracts that it canceled last week.

The government said it pulled the funding over the university’s failure to protect Jewish students from harassment as pro-Palestinian protests spread on campus last year over the war in Gaza. Some of the demonstrations included chants, signs and literature that expressed support for the Hamas-led terrorist attack against Israel on Oct. 7, 2023.

Mahmoud Khalil, who recently completed a graduate program at Columbia and is a permanent resident of the United States, played a prominent role in the pro-Palestinian student movement at the university. The Trump administration has said that Mr. Khalil, who is of Palestinian heritage, is a national security threat. It has also accused him of participating in antisemitic activities, though officials have not accused him of having any contact with Hamas. He is being held in a detention center in Louisiana.

The Department of Homeland Security did not respond to a request for comment. Columbia declined to comment beyond Dr. Armstrong’s letter.