Panama says engine failure behind helicopter crash

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PANAMA CITY, June 2 (Reuters) - A helicopter crash in Panama City that killed Chile's federal police chief and ten others could have been caused by a problem with one of its engines, Panama said on Monday.

Panama's Civil Aviation Authority said in a statement that preliminary investigations showed one of the two motors on the helicopter was not working when it crashed last Thursday.

Five Panamanians and six Chileans were killed when the decades-old helicopter slammed into a store and exploded.

Only one person in the helicopter -- a Panamanian -- survived.

Chilean Police chief Gen. Jose Alejandro Bernales was one of four senior Chilean security personnel traveling in the helicopter when it crashed and broke in half.

The Chileans were in Panama for an anti-terrorism conference.