Sonarpur: Dispute over a piece of land between two groups turned violent at Satali para, Banhoogly area of Sonarpur on Friday. The groups have been claiming right over the land from a long time, the dispute turned ugly when they attacked each other with sharp weapons. Seven people have been injured in the brawl. One person had been admitted to the hospital in a critical condition. Huge police force rushed to the area to contain the situation. Tension prevails in the area after the incident.