Pro-Palestinian protesters take over room in Columbia University library

Several people were arrested Wednesday night after protesters took over a room of a Columbia University library in a resurgence of the on-campus pro-Palestinian demonstrations that rocked the nation last spring.

At least 80 people were detained Wednesday night, police confirmed, after protesters took over a room of a Columbia University library in a resurgence of the on-campus pro-Palestinian demonstrations that rocked the nation last spring.

Confirmation of the detentions came hours after demonstrators, many wearing keffiyehs, stormed into Butler Library, chanting slogans and facing off with police and campus security officers.

Two Columbia Public Safety Officers were injured in a "crowd surge" as people tried to "force" their way into the library, the university said.

Video posted to social media showed university public safety staff physically blocking entry to a campus building as a crowd tried to force its way inside.

Another shows someone being detained while shouting "help!"