Thirteen people, including two policemen, were injured in a blast triggered by suspected militants at Doomdooma in Assam's Tinsukia district today.
According to police, the bomb was planted on a footpath before a departmental store near Gandhichowk area and it exploded at 6:45 pm.
Three critically injured persons were admitted to the Tinsukia civil hospital.
Police and security forces cordoned off the area and launched a search operation.
The sources said that it was an attempt by the anti-talk faction of the banned United Liberation Front of Asom (ULFA) to make its presence felt. There were reports of a group of hardcore ULFA militants sheltering in Dibrugarh and Tinsukia districts, their strongholds.