TV images showed police entering the university in New York which has been the focal point of student protests that have spread across the US

• New York police officers enter Columbia University to disperse student protest

The occupation of Hamilton Hall came after protesters’ defied a 2pm Monday deadline to abandon their camp at Columbia or face suspension. The university promptly began suspending participating students.

Posts on an Instagram page for protest organisers shortly after midnight urged people to protect the encampment on campus and join them at Hamilton Hall. Those signs of supports surfaced as the UN human rights chief said he was “troubled” by how law enforcement has dealt with the recent wave of campus demonstrations.

A little after 9 p.m. this evening, the NYPD arrived on campus at the University’s request. This decision was made to restore safety and order to our community.

After the University learned overnight that Hamilton Hall had been occupied, vandalized, and blockaded, we were left with no choice. Columbia public safety personnel were forced out of the building, and a member of our facilities team was threatened. We will not risk the safety of our community or the potential for further escalation.

The decision to reach out to the NYPD was in response to the actions of the protesters, not the cause they are championing. We have made it clear that the life of campus cannot be endlessly interrupted by protesters who violate the rules and the law.”