"The Chief Secretary and the DGP were told to instruct the police stations to register complaints against obnoxious material on social media during election period," Sampath said at a press conference here.
Action in blocking messages sent via WhatsApp would be taken wherever complaint of offensive materials were found, he said.
The concern was raised by some political leaders during the CEC's meeting with different registered political parties here on Wednesday.

The five-phased Assembly polls in Jharkhand are scheduled to begin on November 25.

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