As police investigate reports that students at Columbia University were sprayed with a chemical during a pro-Palestinian campus protest, a coalition of student groups is demanding an end to a dual degree program between Columbia and Tel Aviv University.

The coalition, Columbia University Apartheid Divest, also called on the university to pay for sickened protesters’ medical bills, for their mental health services and for their damaged property following Friday’s protest.

The demands came as students walked out of class Wednesday afternoon, and 10 have gone to the hospital since the reported attack, according to a tally by a group called Students for Justice in Palestine.