The prospects for a ceasefire between Russia and Ukraine "is in Moscow's hands," a top aide to Ukrainian President Volodymyr Zelenskyy said following talks with the U.S.

Ukraine said it would accept a 30-day ceasefire with Russia after talks with the U.S. in Saudi Arabia on Tuesday.

Kremlin spokesperson Dmitry Peskov told reporters Wednesday that Russia must get the details on U.S.-Ukrainian cease-fire talks before commenting on the proposal.