Government prosecutors have accused Pervez Musharraf of being involved in Benazir Bhutto's murder and not providing enough security to the former Pakistan prime minister.
He has denied the allegations.
Police officer Mohammed Ishaq said killed prosecutor Chaudhry Zulfikar was also involved in a case related to the 2008 terrorist attack on the Indian city of Mumbai that killed 166 people.
The attack was blamed on a Pakistan-based militant group.
More top news
Actor Harrison Ford had a near miss at a Californian airport after landing a plane on a taxiway.
The 18-month-old baby girl was in "excruciating pain" after suffering broken ribs, leg fractures and injuries to her spine, face and neck.
The "world's first transgender doll" has appeared at New York's Toy Fair and will go on sale in July.