A fire at a shopping centre in the Pakistan city of Karachi has killed six people as firefighters continue to battle the blaze. Parts of the Gul Plaza, containing 1,200 stores and spanning 8,000 sq m (86,111 sq ft), have collapsed which officers said was hampering rescue efforts. One firefighter is among the dead, more than 20 people have been injured and there are fears some are still trapped inside the multi-storey mall. Local emergency services said that when helpers arrived at the site on