
The deceased was identified as Makbul Hossain, 70, son of late Hasen Ali of Bagail village under Paikar Union in the upazila.
According to local sources, a long-running dispute over land had been ongoing between Makbul Hossain's family and his grandson-in-law, Shakil.
As the dispute escalated on Sunday around 3 pm, Shakil and his younger brother, Sabuj, allegedly attacked Makbul with sharp weapons.
Shahidul Islam, Shakil's father-in-law, was also seriously injured while trying to save the elderly man.
Locals and family members rescued the two injured men and took them to Bogura Shaheed Ziaur Rahman Medical College Hospital, where doctors declared Makbul dead.
Shahidul is undergoing treatment at the hospital in critical condition, reports UNB.
The accused, Shakil and Sabuj, are residents of the same area. Shakil is married to Sumaiya, the daughter of the injured Shahidul Islam, and is the grandson-in-law of the deceased.
Both suspects have been on the run since the incident.
Kahaloo Police Station Officer-in-Charge Shafiqul Islam said police visited the scene soon after the incident and launched a drive to arrest the accused.
Further legal action is underway, he added.