Ukraine’s security service released footage Wednesday of its attack on Russian war planes at multiple airbases across the country. In the span of a few hours on Sunday, nearly a third of Moscow’s strategic bomber fleet was destroyed or damaged with cheaply made drones sneaked into Russian territory, according to Ukrainian officials.

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.