KARACHI- The Model Town Police on Friday registered a case against former SHO Sohrab Goth Azam Mehsud, his brother Sher Zaman Mehsud and militants of TTP on the complaint of SSP Malir Rao Anwar under sections 302/34, 324/34, 120, 427, Explosive Act and 7-ATA.SSP Malir Rao Anwar had nominated former SHO Sohrab Goth Azam Mehsud and his brother after Malir suicide attack on his convey. When contacted, SSP East Niaz Khoso, confirming the nomination of former SHO in the case, said he was booked under Section 120 of the Act for his alleged involvement in suicide attack. He said the investigation was underway and added that striker sleeve device was used in the blast.Sources said the brother of former SHO Sohrab Goth Sher Zaman Khan had criminal record and he was arrested from a private hospital in injured condition in 2009. They said the accused Azam, who is presently posted in interior Sindh, also served in Pirabad, Pak Colony and Sohrab Goth Police Stations.A suicide bomber had hit SP Malir convoy leaving four people dead and 16 others wounded near Malir Halt intersection in the limits of Model Colony Police Station on Thursday.