A bomb threat closed down a high school in the Hudson Valley during end of the year tests. Authorities are hoping for the public’s help.

Friday around 11:40 a.m., a male called Carmel High School said there was a bomb in the building, potentially on the rooftop.

School faculty and about 250 students were evacuated from the building, which resulted in the interruption of final exams and Regents tests.

Students were escorted to predetermined evacuation locations.

Putnam County Sheriff’s deputies deployed two bomb-sniffing dogs and the MTA Railroad Police provided three additional canines in sweeping the campus for explosives.

Authorities checked the inside of the school, the rooftop, two out-buildings, and parking areas adjacent to the school.

No explosives or suspicious objects were found.

Around 1:30 p.m., students were allowed back into the building and testing resumed.

An email was sent to the student’s parents notifying them of the bomb threat and evacuation.

Sheriff’s investigators are working with school officials to identify the person who made the bomb threat. Anyone with information that may help investigators is asked to call (845) 225-4300. All calls will be kept confidential.