The BJP in protest has called an half-an-hour road blockade throughout West Bengal tomorrow.
Additional SP Tarun Haldar refuted the BJP's charge and said that the police did not make any lathicharge.
He said that 10 police personnel, including IC, Barasat, were injured in the scuffle.
Singh, who was present during the programme, alleged that the police used lathis in which several partymen, including him, "were injured".
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Lone BJP MLA Shamik Bhattacharya told reporters that another party national secretary Suresh Pujari was injured at Krishnanagar during a similar programme.
He announced that the party would organise a road blockade programme throughout the state tomorrow from 2 PM in protest against "unprovoked police action".
BJP national general secretary Kailash Vijayvargiya, who was present at Krishnanagar, said that party president Amit Shah enquired about the incidents and "I informed him of what happened".