Rubio sought to ramp up the pressure on Moscow during a call with Russian Foreign Minister Sergey Lavrov on Thursday, according to officials familiar with the conversation, who add that the administration was hopeful progress could be made in the hours between their talk and the secretary's departure from France.

The US presented allies with proposals to enable a peace deal between Russia and Ukraine, including an outline of terms to end the fighting and ease sanctions on Moscow in the event of a lasting ceasefire.