The explosion occurred in the morning "while personnel were doing routine maintenance on a utility boat," said Navy spokesman Lieutenant Greg Raelson in a statement.
One person was being treated at a local hospital while seven others suffered minor injuries in the explosion at the Naval Weapons Station Earle in Middletown, New Jersey, he said.[break]
Ammunition and ordnance operations at the facility were "not affected" by the blast.
About 1,500 people work at the naval station, which is used as a weapons depot and for ship repairs.
"The cause of the explosion is under investigation," he said.
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