Three police personnel, including a sub-inspector of Birganj Police Station, were injured as they came under attack by some land grabbers in the upazila yesterday.
The injured are SI Bipul Hossain, 25, constables Mozibul Haq, 55, and Habibur Rahman, 30.
They took treatment at Birganj Upazila Health Complex.
Monwar Hossain, a witness, said there had been a longstanding dispute over an acre of land in Chakai village between Afzal Hossain and Abdul Latif Lutu.
Afzal was the legal owner of the land, said police sources.
Recently, a court ordered police to hand over the land to its legal owner after evicting the illegal occupiers.
Accordingly, a team from Birganj Police Station, led by a magistrate, went to the land on Monday and evicted the grabbers. Law enforcers and labourers spent the whole day on knocking down the illegal structures.
At night, the grabbers returned to the land and constructed fresh structures overnight. The grabbers did this after driving away two nightguards, said Monwar.
As Afzal and his family members found structures on the land yesterday, he informed police of the matter.
A team from Birganj Police Station went to the spot. As they reached there, some 30 grabbers attacked the police personnel with sticks, Monwar added.
On information, additional police personnel went there and sent the injured to Birganj Upazila Health Complex.
Masud Hossain, 30, a man associated with Afzal, was also hurt in the attack.
Anwar Hossain, superintendent of Dinajpur police, said many police personnel had been deployed in the area and the situation was under control.
Police detained four people in connection with the attack, he said.
Tension was prevailing in the area over the incident.