Chennai, May 29 : The DMK on Tuesday decided to boycott the state Assembly sessions until the Tamil Nadu cabinet takes a policy decision to shut down the Sterlite Copper smelter plant in Thoothukudi belonging to the Vedanta group. In a statement issued by the party, Whip R. Chakrapani said the K. Palaniswami government issued an order closing down the copper smelter plant without convening a cabinet meeting and taking a policy decision. Chakrapani said this would enable the company to seek relief from the courts. He alleged that the Chief Minister was not sincere about shutting down the plant. (IANS)