A mob angered by an al-Qaida-linked suicide bombing in a Shiite mosque set a KFC restaurant on fire in overnight rioting, killing six employees and bringing the day’s overall death toll to 12, police said Tuesday.Security in Karachi shifted into “high alert,” said Rauf Siddiqi, home minister of Sindh province, of which Karachi is the capital. “These incidents are happening one after the other. We are trying to find a link between them,” he told the private Geo television station. “This is a criminal and merciless attack.”Full Story