A Ukrainian drone struck a Russian industrial plant some 1300 km from Ukraine, a local official said Tuesday, after Ukraine President Volodymyr Zelenskyy prioritised the weapon’s development and Russia pounded Ukraine with a monthly record of drones in June.

The drone hit the industrial plant in Izhevsk, about 1,000 kilometers (620 miles) east of Moscow, injuring several people and starting a fire, Izhevsk regional Gov.  Alexander Brechalov said.

The plant’s workers were evacuated, both sides have raced to improve drone technology and enhance their use on the battlefield. They have deployed increasingly sophisticated and deadlier drones.