BUNER, June 03(ABC): PTI Chairman Imran Khan Friday warned the government against filing a treason case against him after reports emerged that key officials were mulling over the idea. Top federal government officials deliberated over going ahead with filing treason charges against Khan and the chief ministers of Khyber Pakhtunkhwa and Gilgit-Baltistan, respectively, over PTI’s May 25 “Azadi March” during a special …