While inaugurating a National Registration and Database Authority (Nadra) registration centre in Chakwal district, Khosa said, "A PPP special committee had compiled a 600-page dossier to disclose Musharraf"s plan of marginalising the PPP"s mandate through rigging."
The Express Tribune also quoted Khosa as saying, "The committee was scheduled to meet and present the report to visiting US senators, but Benazir Bhutto was assassinated that very day."
A Pakistani anti-terrorism court, conducting the trial of suspects charged with involvement in the 2007 assassination of former premier Benazir Bhutto, had summoned a senior official to explain why authorities have been unable to serve an arrest warrant for former President Pervez Musharraf.
Musharraf, who is currently living in self-exile in Britain and Dubai, however contacted two foreign agencies based in the US and UK for providing security to him following his planned return to Pakistan in 2012.
Benazir Bhutto was killed in a suicide attack and gunfire in the city of Rawalpindi in Dec 2007 following her return to Pakistan after years of exile.