President Trump said the Russian leader Vladimir Putin had warned that he would retaliate for a covert Ukrainian attack in Russia last weekend that destroyed dozens of Russian bombers.

Officials say Ukraine was under an ongoing Russian ballistic missile and drone attack early Friday that wounded at least three people.

Russia mounted an intense missile and drone barrage of the Ukrainian capital overnight, killing four people, Ukrainian officials said, as powerful explosions reverberated across the city. The attack followed a warning from Russian President Vladimir Putin,