The blast ripped through a crowd outside a clothes factory in the city of 12 million people, causing further chaos in the run-up to crucial elections delayed by the assassination of former premier Benazir Bhutto. Asif Ali Zardari, flew in to the city minutes before the bomb went off, although officials said he and Musharraf were far away from the blast and there was no suggestion either man was targetted. "The death toll has risen to 10 and there are about 50 injured people," Akhtar Zamin, the home minister for southern Sindh province, of which Karachi is the capital, told AFP. "This is the work of people who want to destabilise the country going towards holding of peaceful elections," Zamin said. Musharraf and caretaker premier Mohammedmian Soomro condemned the blast and expressed their grief for the loss of life, state media said. In separate messages, they asked law enforcement agencies to use all resources to hunt down the perpetrators, the Associated Press of Pakistan said. "The bomb was planted on a motorbike and exploded outside a textile factory in the Landhi district of Karachi," senior police official Mohammed Javed told AFP.