Ukraine said its drones hit a Russian research and production facility that supplies components for missiles, as Russia unleashed a fresh barrage of air attacks overnight.

Two Ukrainian drones struck the site of an electronics developer and manufacturer in Cheboksary, which temporarily halted operations to protect employees, Oleg Nikolayev, governor of Russia’s Chuvashia region that’s located 1,300 km (800 miles) from the border with Ukraine, said in a Telegram post.

The plant is involved in the missile production process, including for the Iskander system, said Andriy Kovalenko, head of the Ukrainian Center for Countering Propaganda, on Telegram. It also produces navigation systems for Russian Shahed drones and components used in glide bombs, according to the Ukrainian unmanned systems forces.