"We are getting reports of sporadic violence and scuffles in some places, especially Sabong," SEC secretary Tapas Ray said.
The police said 11 people were injured in a clash between Trinamool Congress and Congress workers at Sabong in West Midnapore district. The injured included a TMC gram panchayat candidate.Five of the injured were taken to the Midnapore Sadar Hospital, the police said.
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In another incident, opposition leader and CPI(M) politburo member Surya Kanta Mishra was involved in an altercation with local Trinamool Congress supporters outside a polling booth at Khadurdah Gram Panchayat area in West Midnapore district.
SEC officials said that till 11 am, 30 per cent voter turnout had been recorded in West Midnapore while 25 per cent each in Bankura and Purulia.
The entire Jangalmahal area has been put under a strict security blanket for the last few days with central forces patrolling the area. A helicopter has been kept ready in the West Midnapore district, in case an emergency security situation arises, as the area was till recently a Maoist stronghold.