U.S. President Donald Trump says he's spoke with Russian President Vladimir Putin and that the Russian leader told him “very strongly” that he will respond to Ukraine’s weekend drone attack on Russian airfields.

Russian President Vladimir Putin told Donald Trump in a telephone conversation on Wednesday that Moscow would have to respond to the recent Ukrainian drone attacks, the U.S. President said.Trump said the two men "discussed the attack on Russia’s docked airplanes,

The comments, in an Oval Office meeting with German Chancellor Friedrich Merz, were Trump’s clearest indication to date that he was unsure he would be able to quell Russia’s 2022 full-scale invasion of Ukraine.