Russia’s Defense Ministry reported that its air defenses destroyed over 150 Ukrainian drones overnight, marking one of the largest such attacks this year.

Most drones were downed over the Black Sea, Sea of Azov, Crimea, and the Krasnodar region, causing minor injuries to a 9-year-old boy and damage to homes, vehicles, and gas pipelines.

In Krasnodar, Ukrainian strikes sparked a fire at the Ilsky Oil Refinery, which Ukraine claims supports Russian military operations.

Airports in at least 12 Russian cities imposed temporary flight restrictions due to the attacks, The Moscow Times has reported.

The drone wave comes as Ukraine and Russia begin a new round of peace talks in Switzerland, following earlier meetings in Abu Dhabi.