A man was killed in a lynch-mob attack on Thursday morning after allegedly attacking a local mosque's imam in the Shimultala area of Sadar Upazila in Chapainawabganj.
Mizu Islam was severely beaten by locals around 8 am after he stabbed Imam Mohammad Hossain, said police and witnesses.
Harunur Rashid, a resident of the same area, was also injured while attempting to save the imam.
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Mizu was taken to the 250-bed district hospital, where he was pronounced dead.
Mizu had long been involved in drug dealing, said S.M. Zakaria, officer-in-charge of Chapainawabganj Sadar Police Station.
It is believed he attacked imam Hossain out of anger after the local anti-drug committee provided information about him to the police, he said.
The body was sent to the hospital morgue for autopsy, he said.