A barrage of Ukrainian drones targeted several industrial facilities across Russia in an overnight attack, authorities said on Sunday.

Russia's Defense Ministry said a total of 249 aerial objects were shot down across the country. Moscow Mayor Sergei Sobyanin said several drones had been repelled in the capital region.

In the south of Moscow, debris from a downed drone fell onto the site of a chemical plant, Governor Dmitri Miyaev said on Telegram.

Ukraine has been fending off Russia's full-scale invasion, which began over four years ago. In recent months, it has increased long-range drone attacks on Russia's energy complexes and other facilities vital to Moscow's war efforts.

Russia has been responding with drones and missiles targeted across Ukraine. But analysts say that on the battlefield, Russia's offensive is showing signs of losing steam.Putin admits Ukraine's drones are hurting Russia's economy To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video