Bomb threats are occasionally called in to schools, and rarely do they pan out.
But students at Gloucester County Christian School in New Jersey don't have class Friday because a bomb actually was found Thursday evening, police said.
A school official found what looked like an explosive device while excavation work at the school in Sewell was going on. The official immediately called 9-1-1, police said.
It turned out to be World War II ammunition left behind long again, police said. The finding isn't completely surprising, considering authorities said the school is built on a former military base.
No one was injured and the explosive was detonated by the Gloucester County bomb squad late Thursday.
School was canceled Friday so authorities could do an in-depth search for other potentially buried explosives, police said.
