MOSCOW, Dec 23- OGK-3 (OGKC.MM), a power unit of Russia's metals giant Norilsk Nickel (GMKN.MM), has sold a 0.4 percent stake in the miner for 2.96 billion roubles ($97 million), an OGK-3 spokesman said on Wednesday.

The spokesman said that the shares have been sold to two offshore firms in two tranches of 1.483 billion roubles each, or 3,763 roubles per share.

That is below the current share price of 4,222 roubles, based on which the stake is worth approximately $130 million.

The spokesman said that the shares have been sold following a recommendation of the Accounting Chamber on the disposal of non-core assets, the spokesman said. (Reporting by Anastasia Lyrchikova, writing by Aleksandras Budrys)

Russia