No indication was given as to the size of the four projects – known as Globo Energy 1, Mark 1, Mark 2 and UP Bulgaria 4 – set in Bulgaria’s windy northwest along the Black Sea. But the involvement of Bulgaria’s Commission on Protection of Competition (KZK) would suggest they are significant.

Lukoil, Russia’s second largest oil company after Rosneft, already owns a thermal power plant and an oil refinery in Burgas, and it came under scrutiny earlier this year for alleged violations in accounting for the volumes passing through its Bulgarian network.