The city crime branch, investigating the serial blasts cases of July 26 in Ahmedabad, on Monday named four new suspects involved in the attacks that claimed 55 lives.
Alamzeb, Aafridi, Raquib and Mujib are wanted for planting bombs in different parts of the city, a senior police official said.
"There are other people involved in the serial blasts, besides the ones under police custody, who are still at large. We are on look out for Alamzeb, Aafridi, Raquib and Mujib, key persons behind planting bombs in different parts of the city," Joint Commissioner of Police (Crime Branch) Ashish Bhatia said.
"Name of the other accused, who are yet to be arrested, cannot be disclosed at this stage of investigation. This would alert the culprits and could hamper the probe," he said.
Fourteen accused, including the mastermind Mufti Abdul Bashir, in the serial bomb blasts are under police custody.
SIMI leader Safdar Nagori and four others have been brought in from Madhya Pradesh for questioning in the serial blasts cases.
Series of bomb blasts had rocked Ahmedabad on July 26, one of them took place at the city civil hospital resulting in maximum number of casualties.