Navy officials said the fire started in the lower parts of the ship where embarked Marines keep vehicles and equipment.“There was a report of an internal explosion” in a lower stowage area, Rear Adm. Philip Sobeck, commander of Expeditionary Strike Group 3, told reporters during a Sunday evening press conference just outside the base. “We don’t quite understand yet the source of … the seed of the fire,” he added.
Ah, Wikipedia says no.