It said he would be attending an interview on Thursday. Sharif's office on Monday confirmed the prime minister had received a summons by the Joint Investigation Team (JIT), set up by the Supreme Court to investigate corruption claims that surfaced following the Panama Papers leak. Pakistan's Prime Minister Nawaz Sharif will be questioned on Thursday by investigators probing how his family obtained its vast wealth, the first time a sitting Pakistani premier has appeared before any investigative agency. If Sharif survives the probe, polls suggest he could win next elections.Corruption claims surfaced following the Panama Papers leak.Sharif will be questioned on how his family obtained the vast wealth.