PARK SLOPE — A high school building was evacuated Thursday after a bomb threat was called into the building, police said.
Students from all four high schools inside 237 Seventh Ave. were told to leave the building about noon, police said.
After investigating, police allowed people to return to the building about 12:50 p.m., said Chris Burke, a math teacher at the Secondary School for Journalism, one of the schools in the building.
Students, teachers and other staff from the John Jay building were sent temporarily to the playground outside P.S. 321 while police investigated the threat, Burke said.
"The whole school was evacuated, the streets were blocked off it, the bus was rerouted, it was a frozen zone," Burke said.
He said students were calm during the evacuation. "I guess all those fire drills work, because the students did well," Burke said.
The other school inside 237 Seventh Ave. are Millennium Brooklyn, Park Slope Collegiate and the Secondary School for Law.
