"Why are you not acting? What is your intention? If you feel wrong about what I am saying now, then you are free to lodge another case against me," Modi told an election rally in Asansol.
Modi's attack on the EC came days after an FIR was lodged against him following a direction from the poll panel which said he had violated electoral laws by displaying his party symbol after casting his vote in Gandhinagar and addressed a press conference soon thereafter.
"It is your responsibility to ensure impartial polls. I am making very serious allegations against you," he said, adding, "You have failed to stop rigging and violence in these areas. False cases have been filed against our candidate Babul Supriyo. Election Commission's work is to protect people. I request you to fulfil your responsibilities in the right way."
He said that the poll watchdog has all the government machinery at its disposal and enjoys more powers than even the Prime Minister.
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Modi recalled that he had said in Uttar Pradesh also that in some areas problems are going to happen.
"But Election Commission could do nothing. Today I am saying it again that in Bengal, Bihar and western Uttar Pradesh the same thing is going to happen. Is it not the responsiblity of the Election Commission that elections should be peaceful, there should be no rigging, no violence?," he said.
In Bankura, Modi took a swipe at Mamata Banerjee over her dubbing him as a "paper tiger", saying a real tiger is one who jails those involved in the Sarada chit fund scam and gets back money of the poor.