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.

Russian drone attacks struck several parts of Ukraine overnight, including residential buildings in the southern region of Kherson where 11 people were injured, according to the regional governor, Oleksandr Prokudin. A gas pipeline, a petrol station, a car repair shop and private vehicles were also damaged, Prokudin wrote on Telegram.

Russia has been using drones and missiles to strike targets, wait some time, and then hit the same spot later.