NEW HAVEN, Conn. » New Haven authorities say they have not found a gunman on Yale’s campus and are leaning toward a call warning of an armed man heading to shoot up the school being a hoax.

New Haven Police Chief Dean Esserman said at a news conference this afternoon that New Haven and the Yale campus are both safe.

A lockdown remains in effect on the Old Campus as police search rooms to confirm that no gunman is on campus.

There have been no reports of shots fired or anyone injured and no arrests have been made.

New Haven police Officer David Hartman says an anonymous caller from a pay phone nearby told them his roommate had a gun and was heading to the campus.