More than 60 United States senators have backed a bipartisan bill that would impose new sanctions on countries that continue to buy Russian oil and other energy products, in a move aimed at increasing economic pressure on Moscow over the war in Ukraine.

The proposed legislation would allow the US government to impose tariffs of up to 100% on imports from countries that continue purchasing Russian oil, gas and uranium. Lawmakers behind the bill said the measure is intended to reduce the revenue Russia earns from energy exports, which they argue helps fund its military operations.

The bill has support from both Republican and Democratic senators, giving it enough backing to clear key procedural hurdles in the Senate. Its sponsors said the proposal followed consultations with the White House and is intended to strengthen existing sanctions against Russia.

Supporters of the legislation argue that previous sanctions have not been sufficient to change Russia’s actions in Ukraine, making additional economic measures necessary.

If passed by Congress and signed into law by the US president, the bill would give the administration broader powers to penalise countries that continue buying Russian energy exports, further tightening Washington’s sanctions on Moscow.