An activist of banned organization Bangladesh Chhatra League (BCL) was hacked to death by unidentified assailants on Shilashi Mazar Road in Gafargaon upazila of Mymensingh early Tuesday.

The deceased was Nahian Robin, 27, son of Mofazzal Hossain of Shilashi village under Gafargaon municipality. He was affiliated with a fraction of BCL led by local Juba League leader Tajmul.

Police and local sources said that Robin celebrated his birthday with friends on Monday night. After the celebration, he was returning home on a motorcycle with a friend around 12:45am.

When they reached at Shilashi Mazar Road area, a group of five to six masked assailants intercepted the motorcycle and hacked Robin, leaving him critically injured before fleeing the scene.

Locals rescued him and took him first to Gafargaon Upazila Health Complex and later to Mymensingh Medical College Hospital where doctors declared him dead.

Gafargaon Police Station Officer-in-Charge (OC) Md Atikur Rahman said a BCL activist named Rajib was detained in connection with the murder.

“We believe the killing was linked to an internal dispute within BCL. Necessary legal steps are being taken,” the OC said.