LAHORE Governor Sardar Latif Khosa has asked PML(N) leader Mian Muhammad Nawaz Sharif to arrest the murderer of former Prime Minister Liaqat Ali Khan, President Zia-ul-Haq first and then talk about the arrest of Benazirs murderers. He was addressing a press conference at governor house here on Monday. He appreciated the visit of Nawaz Sharif to the mausoleum of Benazir Bhutto, but asked him not to do politics on her murder. He claimed the federal government made development in the investigation of Bibis murder wherein seven accused including police officials were behind the bar. He said, We were not in power at the time when Bibi was martyred; she was murdered in Rawalpindi. Signaling towards Nawaz Sharif, he said, You are in power in Punjab for the last three and half years and who has stopped you to investigate the case or to arrest the murders of Bibi.