ISLAMABAD: Federal Finance Minister Ishaq Dar filed a petition in the Supreme Court on Tuesday against Pakistan Tehreek-e-Insaaf Chairman Imran Khan, alleging defamation against his person by the PTI chief. The petition stated that Khan had leveled false allegations against the minister. “The higher courts have dismissed all charges,” it said. “Even Imran Khan knows that the allegation he is hurling at me are false,” it added.