Seven Dalits suffered injuries, out of which three were injured in the clash and four sustained burn injuries, officials said.
The clash occurred between members of caste Hindus and Dalits as a group of youths from the latter allegedly used to regularly tease a non-Dalit girl, Vadalur Inspector T Balakrishnan said.
Twelve persons, six from either side, have been arrested he said, adding, police are searching for over 60 other accused.
Police are maintaining tight vigil in the area, Cuddalore Sub-Collector Lalitha told reporters here.
Meanwhile, over 300 activists of the Dalit-based Viduthalai Chiruthaigal Katchi blocked the Cudddalore-Puducherry road demanding arrest of those involved in the attack on the Dalit colony.
Recently on November 7, some 268 houses were torched, 54 vehicles destroyed, jewels and valuables looted in violence unleashed allegedly by caste Hindus on some Dalit colonies in Dharmapuri district after a man committed suicide over his daughter marrying a Dalit man.
