Moscow, July 15 - Neftegaz.RU. New Stream group said Dmitry Mazurov was arrested by the Investigative Committee on July 13 at Sheremetyevo airport when he arrived back in Russia.
It said Mazurov was a suspect in a criminal case but did not disclose further details. New Stream formerly owned the debt-ridden Antipinsky refinery.
Last month, SOCAR Energoresurs, a joint venture between Russia's largest lender, Sberbank, and a group of investors acquired an 80 % stake in the Antipinsky refinery.
The plant filed for bankruptcy in May, weeks after a London court ordered its assets to be frozen in response to a lawsuit from a trading house.