Ukrainian companies are increasing the production of fiber-optic drones.The drones can't be jammed with traditional electronic warfare, making them a huge threat in combat.BI spoke with several people involved in the effort to scale up production to keep pace with Russia.

It came as Russia and Ukraine swapped 150 prisoners of war each and UK foreign secretary David Lammy met with Ukrainian president Volodymyr Zelensky in Kyiv.

A Russian drone struck a multi-storey apartment building in the northeastern Ukrainian city of Sumy early on Thursday, killing nine people and injuring 13, including a child, President Volodymyr Zelenskiy said.

Officials say a Russian drone has blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack that killed at least six people and wounded nine others.

One dead and one seriously injured by a Russian missile in Odesa. As 1,079 days of war in Ukraine are reached, Kiev continues to attack Russian strategic infrastructures. This morning, a missile was launched against an aerodrome from where the Russian Army regularly launches drones into Ukrainian territory.

Akhtarsk in Russia's Krasnodar Krai on the night of 5-6 February, from where the Russians have launched Shahed kamikaze drones to strike Ukrainian cities.

Russia launched 112 Shahed attack drones and decoy UAVs of various types against Ukraine on the night of 6-7 February. Ukrainian air defence has managed to down 81 drones, while 31 failed to reach their targets.

Last month, the Defense Forces' drones hit or destroyed 7% more targets than in December, according to the commander. FPV drones made up the largest share of hits, accounting for 49%. Read also: Russia launches overnight attack on Ukraine with 77 drones and 2 ballistic missiles The 46th Airmobile,