A dozen other people were injured, some seriously, in the attack in the city of Sumy, which has come under increased bombardment since Ukraine’s offensive into Russia’s nearby Kursk region.

Russia said it was working to repel a Ukrainian drone attack on Toropets, where there's a major military depot, as explosions lit up the night.

Over the past few months, Kyiv has grown in confidence and ambition as it has ramped up drone attacks inside Russia. It’s struck as far as 1,800km (1,118 miles) in the past, when a long-range radar was hit in the city of Orsk.