Ukrainian drones targeted a crucial Russian arms factory more than 500 miles from the border.

The state-owned Sverdlov plant is one of the largest manufacturers of explosives used by Russian forces in the war.

It has been under US and EU sanctions since 2023 for acquiring goods in support of Russia’s war effort, producing explosives, industrial chemicals, detonators and ammunition.

An unverified video posted on social media on Sunday showed a large explosion and small drones being downed by air defence systems in the vicinity of the plant in Dzerzhinsk, 225 miles east of Moscow.

It was unclear whether the plant was damaged in the strike. Russian officials confirmed drones had targeted the area but said the attack had been foiled, adding that four firefighters received light shrapnel wounds.

Russia also targeted Ukraine overnight, with attacks wounding 17 civilians in Kryvyi Rih and 10 in Zaporizhzhia. Dozens of drones were shot down over Kyiv.

Ukraine’s foreign minister said on Sunday that recently-produced Western components had been found in the wreckage of a North Korean missile shot down in one attack.