Mahmoud Khalil, a pro-Palestinian activist who was detained for months in immigration custody last year, has filed a federal lawsuit against Columbia University. Khalil alleges that the university exhibited "deliberate indifference" to the harassment experienced by pro-Palestinian students.

Khalil's lawsuit centers on claims of inadequate response by the university to incidents of harassment targeting students who advocate for Palestinian causes. The pro-Palestinian movement has seen increased activism and counter-activism on university campuses across the United States, particularly since the outbreak of conflict in the Middle East.

The specific details of the alleged harassment and Columbia University's response are expected to be further detailed as the legal proceedings develop. Khalil's previous detention in immigration custody for several months last year also forms part of the context surrounding his current legal action.

This is a developing story. Further updates will be provided as more information becomes available.