MOSCOW (AP) — BP’s billionaire Russian partners in TNK-BP indicated on Tuesday that they are considering selling their stake in the oil joint venture or disposing of it through an IPO.

Moscow-based TNK-BP is jointly owned by BP and AAR, a group of Russian billionaire shareholders. The two partners have been locked in a boardroom dispute for much of the group’s existence. In June, BP said it intended to sell its 50 percent in TNK-BP, which AAR signaled it would be interested in buying. Among the other bidders for the share is Russia’s largest oil company Rosneft, chaired by Putin’s former energy czar Igor Sechin.