KYIV -- At least nine people were killed and 40 injured in Russian strikes on Ukraine's cities of Kharkiv and Zaporizhzhia, Ukrainian authorities said Monday.

In Kharkiv, Ukraine's second-largest city, a Shahed combat drone hit a high residential building in the city's Industrial District, killing six people and injuring 20 others, Mayor Ihor Terekhov wrote on Telegram.

The State Service for Emergencies reported that a one-year-old girl and a 16-year-old boy were among the victims, while six children were among those injured. Rescue operations continued with 140 emergency personnel and 39 units of equipment working on the site.

In the southeastern city of Zaporizhzhia, Russia's raids killed three people and injured 20 others, said Ivan Fedorov, the region's governor.

Many of the wounded were hospitalized in severe condition, while residential buildings, an enterprise, a bus stop and commercial premises were damaged, he wrote on Telegram. The attack followed a ballistic missile alert issued for Zaporizhzhia.

Ukraine's air force said Russia launched 140 drones and four Iskander-M ballistic missiles overnight, with 88 drones shot down and other projectiles hitting targets in 25 locations across six regions.