An explosion rocked the Brooklyn Navy Yard on Tuesday morning, leaving a worker in serious condition with burns to his face and arms, officials said.

The blast happened in the FDNY Marine Unit’s mechanic area around 8:30 a.m. as a 55-year-old civilian mechanic was working on a vessel that was in dry dock, authorities said. 

The worker was transported to Methodist Hospital, officials said.

The blast was caused by a high-pressure equipment failure, police sources said.