According to earlier reports, the bomb blast at Suzuki stand at Peshawar Chowk of Kohat left three people dead and scores of others injured.
The injured were transferred to hospital for medical aid where three injured succumbed to their injuries. Among eight injured some said to be in a precarious condition.
Two vehicles were destroyed in the roadside bomb blast, DPO Kohat said.
Around five kilograms of explosives were used in the bomb device, the DPO added.