Both sides in the more than three-year war following Russia’s February 2022 invasion of its neighbor have raced to improve drone technology and enhance their use on the battlefield.

Ukrainian drones struck the Russian city of Izhevsk, over 800 miles from the two countries’ border. The attack killed three people and injured dozens, according to local officials. Ukrainian sources report that the target was the Kupol plant,

Three people have been killed and 35 taken to hospital following an attack by Ukraine on a factory in the city of Izhevsk - more than 1,000km (620 miles) from the border, Russian authorities say.