Police successfully evacuated the library at the University at Buffalo’s North Campus on Tuesday – with reports of a gunman on-site remaining unconfirmed.

The University at Buffalo’s independent student newspaper Spectrum has confirmed via Twitter that the rest of North Campus has also been deemed safe.

During a news briefing the university’s Communications Associate Vice President Joseph A. Brennan said university police at the Amherst, New York campus had completed a room-by-room search of Lockwood Library and they believed everyone was able to leave safely, Buffalo News reported.

The university ordered a campus-wide shut-down after a suspicious man was reportedly spotted on surveillance camera screens with a rifle over his shoulder at about 4.30 p.m. on Tuesday.

Classes on the North Campus remain cancelled as a precaution.