Officials say a Russian drone has blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack, killing at least four people and injuring nine others.

Russian first-person view (FPV) drones that use fiber optic cables instead of radio waves to connect with their controllers, making them impervious to jamming and other forms of electronic warfare. The Magyar Birds Brigade claims it has devised a system using mobile radars to provide early warning for incoming FPV drones several kilometers away.

Russia launched at least 61 drones over Ukraine on the night of 24-25 January, whilst Ukrainian forces confirmed to have downed 46 them. View on euronews

Videos showed fireballs over a facility in Ryazan, 110 miles southeast of Moscow. Kyiv is seeking to disrupt Russian military logistics and put pressure on the country’s economy by striking its oil industry.

Ukraine’s Defense Forces downed 37 drones Russian invaders had launched at Ukraine since Wednesday night. Another 39 drones serving as decoys to exhaust Ukraine’s air defenses eventually disappeared from radar.

An overnight Russian drone attack on Ukraine killed at least four people in the northeastern city of Sumy, Ukraine's Interior Ministry said. Images shared by emergency services showed a gaping hole ripped into the side of an apartment building in Sumy and rescue workers digging through debris as they searched for survivors.