UPDATE 1-Four workers killed in Mallorca hotel collapse

(Confirms death toll, adds details)

MADRID, Dec 16 (Reuters) - At least four workers were killed on Tuesday when the upper floors of a hotel on the Spanish island of Mallorca collapsed after torrential rain, local officials said.

Rescue teams searched the wreckage after the top four floors of Hotel Son Moll -- a nine-storey beachside tower in Cala Rajada, a resort on the eastern tip of the island popular with German tourists -- fell apart.

Rescuers pulled two bodies from the rubble, and later found the bodies of two other workers in the debris, a spokesman for the local authorities in the Balearic Islands said.

"The hotel was being refitted and was closed to the public," an emergency services spokesman said.

A local government official, who asked not to be named, said preliminary investigations suggested the building's foundations had weakened during two days of heavy rain, leading to the collapse of four of the building's nine storeys.

Mallorca has suffered nearly two days of heavy rain, which has closed roads and forced the evacuation of 120 people from their flooded homes. (Reporting by Blanca Rodriguez, Inmaculada Sanz and Raquel Castillo; translating by Ben Harding and Sarah Morris; editing by Tim Pearce)