Ukraine has called for sanctions to be expanded to include a ban on Russian oil exports.
But if an oil ban were to go ahead, Russia has warned it could cut off gas supplies to other countries.
Could there be sanctions on Russian oil and gas?
The West has imposed a series of economic sanctions on Russia following the invasion of Ukraine, but is yet to sanction oil directly.
US Secretary of State Antony Blinken has said there are “very active discussions” about banning oil imports from Russia, while at the same time “maintaining a steady global supply of oil”.
Germany is especially reliant on Russian gas so is vulnerable to any restrictions Russia places on gas flows.
Russia has said it may close its main gas pipeline to Germany if the West goes ahead with an oil ban.
Following the invasion of Ukraine, the approval and opening of the Nord Stream 2 gas pipeline from Russia to Germany was halted.