President Donald Trump said Wednesday that Russian President Vladimir Putin told him that Moscow would retaliate against Ukraine's major drone attack over the weekend, casting doubt that a peace deal to end the war could come soon.

By Guy Faulconbridge and Rami Ayyub MOSCOW/WASHINGTON (Reuters) -Russian President Vladimir Putin told U.S. President Donald Trump on Wednesday that he would have to respond to Ukrainian drone attacks on Russia's nuclear-capable bomber fleet,

President Donald Trump said Wednesday that Vladimir Putin intends to retaliate “very strongly” against Ukraine for a surprise drone strike on Russian airfields over the weekend, a declaration that provoked alarm in Washington and abroad even as Trump touted his efforts to bring peace to the region.