Rubio, who led the American delegation to Tuesday’s talks in Saudi Arabia, said Washington would present the ceasefire offer to the Kremlin, which has so far opposed anything short of a permanent end to the conflict and hasn’t accepted any concessions.

The Kremlin said on Wednesday that it needed to be briefed by the United States on the outcome of U.S.-Ukrainian talks in Saudi Arabia before commenting on whether a proposed ceasefire in Ukraine was acceptable to Russia.