The US has slapped Russia with more sanctions and accused the Russians of a lack of commitment towards ending the war in Ukraine.
The new sanctions — on two of Russia's largest oil companies — were unveiled one day after plans for a summit between US President Donald Trump and Russian President Vladimir Putin fell apart.
Mr Trump said he cancelled the meeting because "it didn't feel right to me."
The move marked a sharp turnaround for the White House, which has veered towards pressuring Moscow to secure peace.
Only last week, Mr Trump appeared ready to hold off on new actions targeting Moscow.
"Now is the time to stop the killing and for an immediate ceasefire,"
US Treasury Secretary Scott Bessent said.
Oil prices extended gains after Mr Bessent's comments, rising by more than U