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NYACK, N.Y. • Authorities say natural gas had risen to "explosive" levels in the manholes at a suburban New York college where a blast rocked a building.
Mike Donohue of Orange & Rockland Utilities says the elevated gas levels had been detected in the manholes around the Nyack College building. Officials say they assume that's what caused the blast.
Seven people were injured when the explosion happened around shortly before noon Tuesday. None of the injuries are life-threatening.
The building's basement and first floor have been severely damaged, with blown-out windows, staircases pushed aside and columns displaced.
Investigators are trying to find the source of the gas.
Nyack College is a Christian college about 25 miles north of New York City.