At least four policemen were injured in an attack on a police patrol team at Sapura area of Rajshahi city on Wednesday night.
According to the eyewitnesses, a procession was brought out by Islami Chhatra Shibir leaders and activists on Wednesday at 8pm protesting the announcement of the 12th parliamentary elections schedule.
At the time, a police van came and tried to obstruct the procession when the Shibir leaders and activists threw stones at the van.
Suhrawardy Hossain, Officer-in-Charge (OC) of Boalia Model Police Station, said four policemen sustained injuries when some people hurled brickbats towards a police van.
One of them was admitted to Rajshahi Medical College Hospital while the other three were discharged after first aid.