Regulators have approved plans by Russia's Gazprom to buy up to 49% in Moscow energy firms forged from the breakup of regional power utility Mosenergo, according to local media.

Gazprombank will buy equity in the utilities, through which Gazprom already controls a stake of more than 25% in Mosenergo.

Mosenergo, meanwhile, has said it will draw a $250 million loan from the European Bank for Reconstruction and Development for refurbishment of its power stations.

The 12-year loan is expected to be syndicated to the tune of at least $150 million.