Russia launched a barrage of drones and ballistic missiles across broad swaths of Ukraine early Friday, killing at least three 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.

Ukraine said its “Operation Spiderweb” attacked Russian warplanes worth hundreds of millions of dollars, utilizing drones that each cost under $1,000 and were launched from wooden containers carried on trucks.