Structural engineers are examining a house in Leeds after an explosion which has left two people in hospital.
A 36-year-old man and a 15-year-old boy suffered burns in the blast in Aysgarth Place, Richmond Hill, on Saturday.
Police said they remained in hospital on Monday. Their conditions are not thought to be life-threatening.
Some nearby properties have been evacuated as a precaution while it is determined whether the house will have to be demolished.
The explosion is thought to have happened in the kitchen of the property and was fuelled by small gas canisters of the type used to refill a lighter.
More than 20 firefighters dealt with the incident at the mid-terrace house.
A police spokesman said: "At this early stage inquiries are ongoing today between the police, fire service and the Health and Safety Executive to establish the cause of the explosion and the subsequent fire.
"This process has been delayed due to safety concerns regarding the stability of the property and the need for it to be safe before being assessed by investigators."