Kushtia: A case was filed against 21 people in connection with Thursday’s clash that left an Awami League activist dead and 15 others injured.

Mahbubul Karim Mollah, brother of deceased Masud Karim Laltu, filed the case with Kushtia Model Police Station on Thursday night, said police.

Akhterazzuman Biswas, incumbent chairman and also the general secretary of Sadar Upazila unit Awami League, his two sons—Sabuj and Biplab have been named as accused in the case, reported UNB.

Police also arrested five people in connection with the incident, said Shahabuddin Chowdhury, officer-in-charge of Kushtia Police Station.

Earlier, Masud Karim Laltu Molla, a supporter of AL rebel candidate Sheikh Siraj Uddin, a former chairman of the Alampur union, was killed and 15 others were injured in a clash with the rival party Akterazzuman Biswas over the ensuing union parishad election at Dhakula village in Sadar upazila on Thursday morning.