Narail district unit of Sramik Union general secretary was beaten to death over a trifling matter in Lohagara upazila Sunday afternoon.
The deceased is Abdullah Al Mamun, 50, of Mohisapara village under the upazila.
Police, however, detained accused Idris Mia in this connection.
Locals and police said that Mamun went to a local kitchen market to buy vegetables.
The victim and Idris, a potato trader of the bazar, locked into an altercation over the price of potato.
At one stage, the trader hit on the head of Mamun with a silver bowl, leaving him critically injured.
He was rushed to Upazila Health Complex where physicians declared him dead upon arrival.
Lohagara police station officer-in-charge Md Ashikur Rahman said they detained accused Idris and legal actions in this regard was underway.
