The deceased was identified as Kashi Nath Halder, 50, son of Sannashi Halder of Bhabanipur in the upazila.
Kashi's brother-in-law (wife's brother) Patan Halder went away to India after taking Tk 15,000 on interest from Abul Hashem a year ago, said victim's son. He neither paid the loan nor the interest during the period.
Hashem had been creating pressure on the victim for getting back his money. On Sunday night, a dispute erupted between them over the issue.
At one stage, Hashem and his accomplice started beating Kashi, leaving him severely injured.
Kashi was declared dead by the on-duty doctor after being taken to the Upazila Health Complex.