DALLAS (AP) - Authorities say an early-morning fire has destroyed a vacant 115-year-old former luxury hotel just south of downtown Dallas.

Dallas Fire-Rescue spokesman Jason Evans says nobody was hurt in Tuesday's blaze at what used to be the Ambassador Hotel. Evans says the caretaker was in a nearby trailer and not in the six-story building, which was undergoing renovation for redevelopment.

Evans says the cause of the fire has not been determined. The structure was engulfed in flames before being extinguished around 5 a.m. Tuesday. Firefighters remained on the scene to monitor for hot spots.

A city website describes the former Ambassador Hotel as a Dallas landmark and Texas Historic Landmark. Authorities say the structure had been vacant for years.

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