A gas explosion ripped through a five-story apartment block in the city of Nizhnevartovsk in western Siberia, Russia on Sunday, killing six people, the emergency services have said.
Emergency Minister Aleksandr Kurenkov told reporters that a leak from a gas tank was the cause of the blast. He added that one of the residents said she had complained to a neighbor about the smell of gas shortly before the incident.
The building did not have a central gas heating system and residents relied on gas tanks to cook food.