Officials say a Russian drone barrage has targeted the center of Kharkiv, injuring nine people and damaging a maternity hospital in Ukraine’s second-largest city.

Major General Thomas M. Suelzer with the Texas National Guard said a remotely piloted aircraft, or drone, was launched out of Houston Sunday to help with rescue and recovery. The MQ-9 Reaper is operated out of Houston and provides reconnaissance to the search and rescue teams.

The early attempt at drones in World War II saw the Army Air Forces convert B-17 bombers into remote-controlled flying bombs.

Kyiv was burning as Dr. Borys Todurov sped through the city in an ambulance, undeterred by the deep thuds of explosions and the terrifying sounds of Russian drones flying overhead.

KYIV, Ukraine (AP) — Russia fired more than 100 drones at civilian areas of Ukraine overnight, authorities said Monday, as the Kremlin dismissed its transportation chief after a weekend of travel chaos when airports grounded hundreds of flights during the busy vacation season due to the threat of attacks from Kyiv.