Russia has used hundreds of Iranian-made self-detonating Shahed drones to attack targets across Ukraine since its fully-fledged invasion in February 2022.

Ukraine has boosted its air defence systems since last winter, when Russia bombarded the country's energy infrastructure, in a bid to cripple it during winter.

Russia on Sunday accused Kyiv's forces of striking several villages in its Belgorod region, which borders Ukraine.

Belgorod governor Vyacheslav Gladkov said drones and artillery fire were directed at several Russian villages, without causing casualties or major damage.