The deceased was identified as Ashikur Rahman Rohit, 20, BCL activist of MES College.
Officer-in-Charge of Bakolia Police Station Nezam Uddin said some miscreants attacked Rohit on January 8 in Dewan Bazar of Bakolia in Chattogram city, leaving him severely injured.
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He was admitted to the CMCH where he succumbed to his injuries on Friday morning, OC said.
Victim’s brother Jahidur Rahman filed a case accusing three people over the matter.
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Jahidur Rahman said the arguments emerged after some miscreants tried to tear apart some anti-drug posters which Rohit had earlier put up on the walls on January 5.
They had also threatened Rohid after the dispute and later plan-fully attacked him on January 8 afternoon, Rahman alleged.
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Meanwhile, local BCL men demonstrated and blocked the Gulzar intersection of Chawkbazar at 11 am seeking arrest of the attackers.