About 50 teachers at a New Jersey school experienced a terrifying moment when a shooting rampage turned out to be a drill, but the teachers didn't know it.

It happened Aug. 28 at the Phillipsburg New Jersey Early Learning Center.

A man burst into the library and started shooting. But the gun didn't have any bullets, just blanks.

Teachers took cover under child-sized tables, crying and trembling.

"People are crying. The girl next to me is trembling and shaking. You heard people crying. You heard other people praying. It was pretty dramatic," one teacher said.

The school district put the drill in place to test staff readiness.

The Phillipsburg School Board heard from angry teachers and parents Monday night.

The board is reviewing the drill.