MOSCOW (Reuters) -Russian President Vladimir Putin on Wednesday openly questioned the point of peace talks with Ukraine after accusing Kyiv's senior leadership of ordering deadly terrorist attacks on bridges in Russia that killed seven and injured 115 more.

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.

The barrage, one of the fiercest of the three-year war, struck six Ukrainian territories, killing at least six people and injuring about 80, Ukrainian officials said.