Governor Vyacheslav Gladkov of Belgorod Region posted on Telegram on Sunday that three people were killed and four others injured after "a series of loud noises were heard in Belgorod and a private residential building was on fire," adding that at least 39 residences were partially destroyed.

Rescuers later found two bodies in the debris, bringing the total death toll to five, according to the local emergency services.

The cause of the incident is still being investigated.