Russian forces have recaptured Sudzha, the largest town that Ukraine once occupied in the Kursk region, according to Moscow, threatening Kyiv’s sole territorial bargaining chip amid pressure to negotiate an end to the war.

The Kremlin has said it does not want to get ahead of itself after Ukraine announced it was ready to accept an immediate 30-day ceasefire with Russia.

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.