A loud boom was reported at Marathon Petroleum Corp.'s Texas City refinery early Tuesday morning, but company officials said there were no major concerns at the plant.
The explosion happened about 11:45 p.m. Monday night. It was strong enough to shake windows and startle residents miles away.
"There were no injuries and no off-site impact, and local emergency responders were notified as a precaution," said Jamal Kheiry, a communications manager for Marathon Petroleum Corp.
Kheiry declined to say if operations at the plant were back to normal this morning.
Texas City Emergency Management Coordinator Tom Munoz said the explosion happened when a cylinder containing ammonia exploded.
The exact cause of the explosion was not known, Munoz said. No one was injured, he said.
The plant's fire department responded to the explosion, Munoz said. The Texas City Fire Department was monitoring the situation, and an industrial hygienist was on scene to make sure no emissions had escaped the plant.
There was no threat to the public, Munoz said.
— John Wayne Ferguson