Two groups allegedly fighting over the control of an alleged unauthorised construction near EM Bypass opened fire at each other, leaving two persons injured, police said.

The incident happened at Gulshan Colony in Anandapur on Friday evening.

An officer of Anandapur police station said the injured were taken to Calcutta National Medical College and Hospital. “Both suffered injuries on their arms and are out of danger,” the officer said.

The police said they had received information about a fight at Gulshan Colony around 5.30pm and rushed to the spot. Around 50-60 men were engaged in a fight over the ownership of a plot, where one of the groups had started an alleged unauthorised construction, an officer said.

By the time the police had reached the place, the groups had allegedly opened fire at each other. The police took the injured to the hospital.

“One of the persons who opened fire has been identified,” said an officer. “He and his accomplices were not found at the spot. A search has been launched for him.”

Based on complaints lodged by both groups, Anandapur police station has started two cases of rioting, causing grievous hurt with dangerous weapons and attempt to murder. No one was arrested till Friday evening.

Police suspect the groups are being backed by local politicians.