At least 40 protesters were arrested during a pro-Palestinian rally at Yale University in Connecticut, the school’s police chief told the Yale Daily News.

Those arrested face charges of trespassing, a Class A misdemeanor, Yale Police Chief Anthony Campbell told the campus news publication. Campbell said those arrested would be released after processing.

Tensions at many US universities have been high ever over Israel’s war on Gaza since October 7.

At Columbia University in New York, officials announced all Monday classes were virtual.

The decision was made to “deescalate the rancor and give us all a chance to consider next steps,” Columbia President Minouche Shafik said.