The deceased was identified as Rony Hawlader, a student of Balakair Azharia High School and son of Anwar Hawladar of the village.
Manirul Islam, officer-in-charge of Sadar Police Station, said Notun Sheikh and Rahim Mollah had been at loggerheads for a long time over control of the area.
Several days ago, Rahim and Bhulu Molla beat up Sheikh. Sheikh retaliated and beat up Rahim on Thursday morning, which led to a clash between their supporters who fought a pitched battle.
Witnesses said the rival groups exchanged gunshots during the melee that started around 9am.
Rony, a supporter of Sheikh, was killed on the spot and ten others were injured.
The injured were taken to local a hospital.
Additional police have been deployed in the area to avert further trouble.