An entire section of a five story residential building in the Russian city of Yaroslavl collapsed early Tuesday after a powerful gas explosion, with up to 20 people trapped in the rubble.
The emergencies ministry said that four people have been rescued, RT news reported.
Authorities have confirmed one fatality after a man's body was pulled out from the debris.
According to TASS news agency, up to 40 people could have been inside the affected part of the building at the time of the incident.
Three of those rescued suffered significant injuries, while one woman reportedly suffered serious fractures to her legs.
Rescue operations are ongoing.