Ukraine reportedly hit a Russian oil refinery and targeted Moscow during an attack involving a wave of at least 121 drones, one of the largest single operations of its kind during the war.

Video footage verified by the BBC shows a fireball rising over the refinery and pumping station in the Ryazan region, southeast of Moscow, which Ukrainian officials said was a target.

Russia said it had shot down 121 drones that had targeted 13 regions, including Ryazan and Moscow, but reported no damage.

Elsewhere, Ukrainian authorities said three people were killed and one was injured when a Russian drone hit a residential building in the Kyiv region.