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.

Russian and Ukrainian officials are due to sit down on Monday in the Turkish city of Istanbul for their second round of direct peace talks since 2022, but the two sides are still far apart on how to end the war and the fighting is stepping up.