The American military help is vital for Ukraine's shorthanded and weary army, which is having a tough time keeping Russia's bigger military force at bay.

The Kremlin said on Wednesday it was studying a proposal for a 30-day ceasefire in Ukraine, after American and Ukrainian officials said the ball was in Moscow’s court. The United States agreed on Tuesday to resume weapons supplies and intelligence sharing after Kyiv said at talks in Saudi Arabia that it was ready to support a ceasefire proposal.

The Kremlin broke silence on Wednesday, delivering its initial reaction to Kyiv and the White House’s unilateral agreement proposing a temporary ceasefire.

The resumption of U.S. military and intelligence aid for Ukraine follows a contentious White House meeting between the American and Ukrainain leaders, but Moscow is unlikely to agree to the proposed ceasefire.

An influential Russian lawmaker, commenting on a ceasefire proposal agreed between U.S. and Ukrainian officials, said on Wednesday that any deal would be on Moscow's terms, not Washington's. "Russia is advancing (in Ukraine),