Investigators on Sunday started probe of a suicide attack in rally of Interior Minister Aftab Ahmed Khan Sherpao in Charsadda. The investigation team visited the place of the incident to collect evidences from the place.
FIA's Special Group of Investigation has hinted that Saturday's suicide attack bore a resemblance to previous attacks in Islamabad, Peshawar, Tank and Dera Ismail Khan.
The investigators said that ball bearings were used in the device and Russian made explosives and jacket were used in the attack.
The investigation team, comprises of four officials, had also held probe into Islamabad, Peshawar, Tank and Dera Ismail Khan bombings.