The police have obtained footage from several CCTV cameras. In one footage, some people in a white car are seen arriving in front of a shop.
They were seen beating a man standing on the roadside and dragging him to the car. Another man holding a pistol was also seen running behind the vehicle.
Motijheel police station in-charge Abul Kalam Azad told Pratham Alo that one of the two groups was constructing a building on the disputed land.
When rivals protested the construction work, blank shots were fired.