Ten people were killed in central Russia on Sunday as strong winds felled trees and heavy rains knocked out power in hundreds of communities, according to Russia’s Ministry of Emergency Situations.

According to the ministry, eight of the 10 were killed and 29 were injured at a camping site near Lake Yalchik in the Mari-El region.

Russia’s Investigative Committee said it had opened a criminal case into the incident that killed three children.

Pictures posted by the ministry on the Telegram app showed cars and tents badly damaged and crushed by fallen trees.

Storms disrupted the power supply in 520 settlements, damaged the roofs of 41 residential buildings and seven buildings that provide social services in eight different Russian regions, officials said.