The left hand of an 'illegal' sand lifter was cut off allegedly by rivals at Aria Bazar on Bogra-Dhaka highway in Shajahanpur upazila on Friday night.
The victim was identified as Moshiur Rahman, 32, son of Rafiqul Islam of the area.
Locals said a gang of 10 equipped with lethal weapons swooped on Moshiur and his associate Morshed Ali, 24, of the area. They severed Moshiur's left hand, stabbed Morshed and left the area. Both were admitted to Ziaur Rahman Medical College and Hospital.
Police said Moshiru is an illegal sand lifter of the area and was fined Tk 50000 by a mobile court recently.
No case was filed in connection with the incident with the police station concerned as of 6:00pm yesterday, said the OC.
Police are raiding different areas to arrest the attackers, he added.