Putin would find it hard to agree to the ceasefire idea without hashing out terms and getting some sort of guarantees, a senior Russian source said.

U.S. officials were in Moscow for talks, and the Russian leader said he was open to a cease-fire, but President Volodymyr Zelensky of Ukraine expressed skepticism.

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