The U.S. is expected to announce as early as Tuesday that it will ban imports of Russian oil, NBC News reported, citing two sources familiar with the matter. The United States is willing to move ahead with a ban on Russian oil imports without the participation of allies in Europe, in light of Russia’s invasion of Ukraine.

President Joe Biden held a video conference call with the leaders of France, Germany, and the United Kingdom on Monday as his administration continues to seek their support for a ban on Russian oil imports. The White House is also negotiating with U.S. congressional leaders who are working on fast-tracking legislation that would ban Russian imports,

a move that is forcing the administration to work on an expedited timeline, a source told Reuters, speaking on condition of anonymity. A senior U.S. official, also speaking on condition of anonymity, told Reuters that no final decision has been made but “it is likely just the U.S if it happens.”

Meanwhile, Russia has threatened to close a major gas pipeline to Germany and warned of $300 oil prices if the West goes ahead with a ban on its energy exports.

“It is absolutely clear that a rejection of Russian oil would lead to catastrophic consequences for the global market,” Russian Deputy Prime Minister Alexander Novak said Monday in an address on state television. “The surge in prices would be unpredictable. It would be $300 per barrel if not more.”

Novak also cited Germany’s decision last month to halt the certification of the highly contentious Nord Stream 2 gas pipeline, saying: “We have every right to take a matching decision and impose an embargo on gas pumping through the Nord Stream 1 gas pipeline.”

“So far, we are not taking such a decision,” Novak said. “But European politicians with their statements and accusations against Russia push us towards that.”