The National Accountability Bureau (NAB) has summoned the Leader of Opposition in National Assembly and PML-N President Shehbaz Sharif in Lahore Waste Management Company (LWMC) case on July 12. Sources claimed that the NAB Lahore has already handed over a questionnaire to Shehbaz Sharif comprising seven questions. The opposition leader has been asked why the summary of the LWMC's formation was approved without approval of the finance and law departments, the sources said.