Ukrainian authorities say a Russian drone and missile attack on Ukraine’s capital killed at least six people including a 6-year-old boy.

The assault came soon after President Trump threatened new sanctions against Moscow if the bloodshed didn’t let up.

Five people have been killed in overnight strikes in Russia and Ukraine, as the two sides continue to trade drone attacks. Ukrainian officials said on Saturday that more than 200 drones and almost 30 missiles were fired by Russia, with most targeting Dnipropetrovsk where three people died.