Allen & Overy (A&O) and Curtis Mallet-Prevost Colt & Mosle have advised on the $1.6bn (£1bn) acquisition of a 50% stake in a German refinery by Russian oil company Rosneft.

Rosneft has acquired the stake in Ruhr Oel from Venezuelan oil company Petroleos de Venezuela (PdVSA). Ruhr Oel was previously a 50/50 joint venture between BP and PdVSA.