The deceased was identified as Mohammad Ali alias Ali dacoit, 40, son of Najar Pramanik of Prajapati Char in the upazila.
Mohammad Basiruddin, additional superintendent of Jamalpur Police, said a team of police conducted a drive in Prajapati char and arrested Mohamamd Ali and NupurAkter Happy, 26, daughter ofTofazzal Hossain of Khulna district from a boat on Monday evening.
Later, police along with Ali conducted a drive at Kutilarchar for recovering arms around 3 am.
Sensing presence of the law enforcers, the associates of Ali opened fire on police, forcing them to fire back, triggering a gunfight.
Ali was caught in the line of fire and suffered bullet wounds while the others managed to flee the scene.
Later he was taken to Islampur upazila health complex where doctors declared him dead.
Three policemen were injured in the ‘gunfight’.
One revolver and 500 Yaba tablets were recovered from the spot.
Ali was wanted in 12 criminal cases, said police.