QUETTA, Pakistan — A gas explosion in southwestern Pakistan killed a family of six, including four children, police said Sunday.

The husband, wife and their four children died at their home Saturday night in the Satellite Town area of ​​Quetta. The fire started when a family member tried to light a heater that was connected to a leaking cylinder.

The children were between 4 and 14 years old. No one in the family survived.

Relatives of the victims took the bodies to the Quetta Civilian Hospital, said Dr. Waseem Baig, a spokesman for the hospital.

Temperatures in Quetta, Balochistan province, can drop to minus 7 degrees Celsius (19 Fahrenheit) at night, and most homes rely on gas cylinders for heat because they don’t have access to a main supply.