Firefighters from Chesterfield, Staveley, Clay Cross and Nottingham Road attended the incident at a two-storey terraced property on St Helen’s Street at around 5.30pm yesterday, August 23.
An investigation by Derbyshire Fire and Rescue Service into the cause of the incident has now concluded the most likely cause to be an ‘accidental explosion due to a portable gas canister’.
A spokesperson for Derbyshire Fire and Rescue Service said: “The property suffered structural damage, trapping two female and one male occupant inside.
“All three occupants were rescued by crews and handed into the care of East Midlands Ambulance Service and the Hazardous Area Response Team (HART) .
“Derbyshire police were in attendance to liaise with emergency planning to ensure residents’ safety and wellbeing, and also put a road closure in place to ensure public safety.
"Derbyshire Building Control Partnership and gas and electricity boards were also in attendance.”