Police and locals said someone blasted the bomb at the bazar, 25 km off the district headquarters, at about 8:00pm.

"Panicked by the blast, traders at the bazar downed the shutters of their shops as people ran helter-skelter," says a spot account of the incident.

On information, police went to the spot and sent the injured to hospital.

Of the injured, condition of three--Dulal Hossain, Mijanur Rahman Mijan, a fish trader, and Bacchu--was stated to be critical.

Identity of other injured could not be known.