The Votkinsk factory, that produces ballistic missiles, is more than 1,400 kilometers (870 miles) from Ukraine.

Ukrainian forces struck a major industrial site deep inside Russia’s Udmurt region, the Ukrainian General Staff said on Saturday.

The attack was confirmed by local officials. “One of the republics facilities was attacked by drones” launched by Ukraine, regional head Alexander Brechalov said in a Telegram post.

The Ukrainian military said it used domestically produced Flamingo missiles to hit the plant, located about 1,400 kilometers (800 miles) from Ukraine.