Ranjani Srinivasan’s student visa was revoked by U.S. immigration authorities. That was just the start of her odyssey.

The Department of Homeland Security arrested a second student involved in the protests at Columbia University.

Khalil’s arrest could have a chilling effect on on- and off-campus protests involving people who aren’t citizens, said Columbia University immigration law professor Elora Mukherjee. Already, she said, it had provoked panic and fear among immigrant students on campus.

A group of federal, state, and local officials in Michigan is calling for the release of Mahmoud Khalil, a Columbia University activist who was arrested by federal agents after leading pro-Palestinian protests last year.

A prominent Palestinian activist who helped lead last spring's protests at Columbia University has been arrested by federal immigration agents.