Students at Cooperative Arts and Humanities Magnet School on the corner of College and Crown streets are returning to class an hour after the police received a 911 call that a bomb was set to go off at the school, according to a report by the CBS-affiliate television station WFSB.

The Coop campus, along with nearby New Haven Academy, was evacuated at 10:40 a.m. while the bomb squad searched the building for explosives. Authorities did not find any dangerous items inside the school, and they allowed students and faculty to reenter at 11:30 p.m.. Police suspect the bomb scare was a hoax: This is the third time someone has called 911 to report a bomb threat, and all three claims came from the same telephone number, the New Haven Police Department told WFSB.