Washington sanctioned Lukoil, Russia’s largest privately-owned oil producer, in October as part of efforts to pressure Moscow over the war in Ukraine, prompting the company to seek buyers for its foreign holdings.

Discussions are underway with oil majors ExxonMobil and Chevron, as well as investors from the Middle East, ahead of a U.S.-imposed Dec. 13 deadline. The United States has already rejected Swiss trader Gunvor as a buyer, sources said.

Lukoil’s Vienna-based international arm owns European refineries, shares in oilfields in Kazakhstan, Uzbekistan, Iraq and Mexico, and hundreds of fuel stations globally.

One source said MOL is targeting European refineries and fuel stations, as well as stakes in upstream assets in Kazakhstan and Azerbaijan.

The sources declined to be named due to the sensitivity of the negotiations.