Twenty people were injured in a clash between Trinamool Congress and CPI(M) workers over a piece of land near Siliguri on Saturday, police said.
The incident had started out as a fight began between brothers over the possession of land at Sitaguri village in Ambari area. The situation was contained for sometime after the intervention of police, they said.
However, by evening the situation snowballed into a clash between the two political parties in which sticks were used and 20 people were injured from both sides, they added.
Police then rushed to the spot and brought the situation under control. No complaints were lodged in connection with the incident.
The injured were rushed to a nearby health centre. Ten of them were referred to North Bengal Medical College Hospital,where four were stated to be in a critical condition.
Police said six of the injured were released after treatment at the health centre and four of them are still being treated there.