A Ukrainian strike on the town of Rylsk in Russia's Kursk region on Friday has left "dead and wounded" people but the precise toll is unclear, Russia's Investigative Committee said.

"Fighters from the Ukrainian army... launched a missile attack on the town of Rylsk... According to preliminary information, there are dead and wounded" people, the committee said in a statement.

Regional governor Alexander Khinshtein said emergency services were at the scene "but their actions are being impeded by repeat strikes from Ukrainian forces."

He said air defense had shot down several HIMARS rockets and accused Kyiv of targeting civilian infrastructure, calling the attack a "massive" strike.

Videos on social media showed cars on fire, debris strewn on roads, and buildings with windows blown out.

The attack comes after a Russian strike on the Ukrainian capital Kyiv that killed at least one person and damaged several embassies.