At least five people have been killed in Karachi after part of a four-storey clothing factory's roof caved in during a fire.

Three fire-fighters and two factory workers were said to be among those killed by the collapse, which also injured 19 people yesterday (15 January) in the southern Pakistani city, which is the capital of the Sindh province.

The fire reportedly started on the second floor of the garment export firm's warehouse. The cause is not yet known.

Despite an evacuation, people became trapped under rubble after the roof fell.

Factory fires are a relatively common occurrence in South Asian countries such as Pakistan and Bangladesh. Electrical faults are often to blame.

Just last week 27 workers were injured as a result of a garment factory fire in Naujore, Sadar Upazila, in Bangladesh.