Officials say a Ukrainian drone has struck an industrial plant deep inside Russia, injuring several people and causing a fire.

Explosions were heard in Kyiv on July 3 as Russia launched a wave of drones across Ukraine. Tymur Tkachenko, head of the Kyiv City Military Administration, confirmed that one drone was shot down over the capital.

Russian forces have become adept at retooling Iranian kamikaze Shahed drones, making them more deadly and less vulnerable to Ukrainian defenses, according to Kyiv.