Ukraine said it hit a drone command unit in the Kursk region, amid reports of fresh attempts to cross into Russia. Sunday's attack on the unit was located near the Russian village of Tyotkino, according to the Ukrainian general staff.

Russia's aviation watchdog Rosaviatsia said the four airports were closed 'to ensure safety' as Ukraine launched an overnight drone attack targeting Moscow for a second night in a row

All four of Moscow's airports closed for several hours as drone attacks were reported across the country. Elsewhere in Russia, Ukraine's military has said it maintains a presence in Kursk, where fighting has continued over the past 24 hours.