disabled cruise ship

U.S. Customs and Border Protection / Flickr

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.

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The Coast Guard says a second tug boat has reached a disabled cruise ship in the Gulf of Mexico and is helping tow it to Mobile, Ala.

More than 3,000 passengers and a crew of more than 1,000 aboard the Carnival Cruise Lines ship Carnival Triumph have had limited services since a fire in an engine room Sunday. The original plan was to tow it to Progreso, Mexico, but currents pushed it north.

No injuries have been reported.