At least 13 people, including four children and five women, were killed and 14 others injured after a gas cylinder exploded in a three-storey residential building in Soldier Bazaar No. 3, Pakistan's Karachi, on Thursday.

Axar.az informs, citing Geo News, the blast occurred on the first floor on Wednesday night, causing part of the building to collapse, rescue sources on the ground said and added that all the available resources were being used in the search operation.

Police said initial information suggests the explosion was caused by a gas leak, possibly from a cylinder or a gas suction machine.