The clash took place yesterday evening after an heated argument between the supporters of the sarpanch aspirants during filing of nomination papers from Krushanchhai gram panchayat in Sheragada block, they said.
At least six persons from both groups had sustained minor injuries in the pre-poll clash. They were taken to a hospital at Sheragada and most of them were discharged after treatment, they said.
"We have arrested 28 persons from both groups. We are also searching for other people involved in the group clash," Inspector In charge of Sheragada police station, Biswa Ranjan Nayak, said.
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