Activists of the CPI (M) and Trinamool Congress clashed in Nandigram on Saturday, a day after opposition parties observed the first anniversary of the police firing that claimed 14 lives here.
The clash took place at Chowrangi Bazar at about 11 am and two persons, one worker each of CPI (M) and Trinamool, were injured, Purba Midnapore district Superintendent of Police, S Panda, said.
According to the two parties, however, six were injured.
CPI (M) leader Ashok Bera claimed that Trinamool men beat two of their workers up when they were passing the area on a motorbike.
The two were admitted to hospitals at Nandigram and Tamluk, Bera said.
Trinamool Congress, on the other hand, said four of its workers were beaten up by CPI (M) activists after an altercation among them at a tea stall.
"They brought sticks camps from a CPI (M) party office at Chowrangi Bazar and beat up our men," Trinamool MLA Sisir Adhikari alleged.
The superintendent of police said no any party lodged complaint and no arrest was made.