Abu Taher, 45, an AL activist and owner of a fish farm, was shot dead by four men in front of Bagmara Primary School under Rupsha Police Station at around 10:30pm, eyewitnesses said.

Rupsha Police said they caught Sagor, 25, one of the alleged killers and an activist of the outlawed Purbo Banglar Communist Party (PBCP), after shooting him in the leg during a chase. Ten gun cartridges were recovered from his possession.

Eyewitnesses said Sagor was carrying a sown-off rifle when police shot him and threw his weapon into the river before his arrest.

Police have reportedly launched a manhunt for the other killers and picked up six suspects during a nightlong operation. Additional police have been deployed at areas of Rupsha upazila that are known to have hideouts of PBCP and other outlawed outfits.