Times Wire Reports

An accident during repair work at Russia's largest hydroelectric plant killed at least 11 workers, while as many as 65 others were missing after an engine room was suddenly flooded, officials said.

The cause of the accident at the Sayano-Shushenskaya plant in southern Siberia was unclear.

Federal investigators said a transformer exploded during repairs, destroying walls and the ceiling in an engine room where turbines are located and causing the room to flood.

The plant's owner said the flooding occurred because of a pressure surge in water pipes.

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