Seven people were killed and 15 others injured in a gas pipeline explosion at Patharghata in the city on Sunday morning.
The identities of the victims could not be known yet.
Mohammad Mohsin, officer-in-charge of Kotwali Police Station, said the gas pipeline in front of five-storey Barua Building at Brick Kiln Road exploded with a big bang around 8:45am.
Witnesses said walls of the building were blown off following the explosion, killing seven people on the spot.
The gate of the nearby building and a microbus at its garage were also damaged, they said.
On information, police and firefighters rushed in to carry out the rescue operation.
The injured were taken to Chittagong Medical College Hospital.unb