Russia launched a barrage of drones and ballistic missiles across broad swaths of Ukraine early Friday, killing at least four people and injuring dozens of others, days after Kyiv launched a daring raid on Moscow’s fleet of strategic bombers.

After Russia bombarded Kyiv and other cities, Ukraine said that it struck two airbases, an oil refinery, and a defence production plant in Russia in the latest round of attacks on strategic targets in the country.

Russia launched an intense missile and drone barrage at the Ukrainian capital in the early hours of Friday and three people were killed, Ukrainian officials said, as powerful explosions reverberated across the country.