A Coast Guard official says the cause of the engine-room fire on the Carnival cruise ship Triumph was a leak in a fuel oil return line.
In a teleconference Monday, Cmdr. Teresa Hatfield estimated that the investigation of the disabled ship would take six months.
She said the Bahamas is leading the investigation, with the Coast Guard and National Transportation Safety Board leading U.S. interests in the probe.
She said investigators have been with the ship since it arrived Thursday in Mobile, and interviews have been conducted with passengers and crew.