VLADIVOSTOK, Russia, Jan. 29 -- All the 231 staff members were evacuated from the Novosibirsk Hydroelectric Plant in Russia's Far East region of Siberia over a bomb threat, the station said Friday.

A report was received in the morning suggesting that a bomb had probably been planted at the hydropower station in Novosibirsk."All the forces of the emergency response were alerted and mobilized," the station's press officer said.

So far, operation of the hydropower station has returned to normal, but all repairs have been suspended, according to the press officer.

The hydropower plant has a power generation capacity of 465 megawatts, and its average annual electricity generation stands at about 2 billion kwh.