The incident occurred in the Kahna area of the city.
Family in Kurram Agency hosted wedding guests in the house suffered the calamity wherein lives of women and children constitute a major part of casualties.
Three women are under treatment at the Mayo Hospital.
There are reports of four more people currently under the debris of a collapsed roof owing to the cylinder blast.
The incident was reported in Musa Banda area of Swabi.
The rescue sources confirmed that two persons have died and five wounded in the roof collapse incident.
Rescue operation is currently underway.