Ishtiak Ashfaq Russel, officer-in-charge of Kalkini police station, said the clash broke out between the supporters of Milon Mia' and Awami League-backed candidate Chan Mia Shikder.

A chase and counter-chase took place between them and a number of bombs were hurled during the incident.

Alamgir suffered injuries in the attack and was undergoing treatment at hospital in Mohammarpur area of Dhaka where he succumbed to his injures on Monday morning, said the OC.