KARACHI - Sindh Education Secretary Fazlullah Pechuho has revealed that National Accountability Bureau (NAB) is investigating corruption in the education department. He told a TV channel that “Illegal appointments were made in the education department after 2012. People who have no link with teaching have been recruited as teachers.” The secretary said NAB had been handed over documents that it had sought. He dismissed the reports that FIA had stopped him from going abroad at the airport.