ISLAMABAD: The Joint Investigation Team (JIT) formed by the federal government, has again summoned 16 members of Pakistan Tehreek e Insaf(PTI)  over allegations of spreading negative propaganda on social media. According to the sources, 16 people of PTI have been issued notices to appear before the JIT on March 18. Sources say that Firdous Shamim Naqvi, Khalid Khurshid, Mian Aslam