Police: Yale Univ. "hoax caller" seen on surveilance video

NEW HAVEN, Conn. - Police say they have images from a surveillance camera of the person who made a phone call Monday saying an armed man was heading to shoot up Yale University.

Authorities also say they have identified several persons of interest in their investigation following yesterday's six-hour campus lock-down. New Haven Police Chief Dean Esserman said Monday he was leaning toward the incident being a hoax. 

SWAT teams searching the Ivy League campus didn't find a gunman after a room-by-room search. No one was injured.

Students and faculty were asked lock themselves in their dorms and offices. Classes were suspended and those who were not on campus were asked to stay home. 

A 911 call was received at 9:48 a.m. Monday from a man at a pay phone about a mile from the campus who said his roommate was on the way to the university to shoot people.

Reports of the sighting of a man with a rifle seemingly validated the call. Police later said the man carrying the rifle was probably one of the first responding officers, according to the Hartford Courant.

Classes aren't in session this week.