An activist of Sramik League was allegedly killed in an attack by the leaders and activists of BNP during the nationwide dawn-to-dusk hartal at Mahendranagar in Sadar upazila of Lalmonirhat district on Sunday.
The deceased was identified as Jahangir Hossain, 50, an activist of Gokunda unit Sramik League and son of Azizar Rahman of the area.
Witnesses said local leaders and activists of Awami League and its associate bodies brought out a procession against the daylong hartal in the morning.
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When the procession reached Burirbazar Mosque area, police obstructed them.
At one stage, some BNP men started throwing bricks targeting police and Awami League men, initiating a chase and counter chase.
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Later, some BNP men beat up Jahangir and stabbed him with a sharp weapon, leaving him injured, they said.
Jahangir was taken to Rangpur Medical College and Hospital where the doctors declared him dead, said Omar Faruk, officer-in-charge of Sadar Police Station.
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Two activists of Awami League were also injured in the attack and they were undergoing treatment at the hospital.
No complaint has been lodged yet, said the OC.