In a statement, the NSCN-IM, which has engaged in peace negotiations with the centre's interlocutor since 1997, said the "imposition" of assembly elections is not acceptable to the Naga people who are for an early negotiated political settlement.
"Therefore, those who advocate for the imposed election does not stand for the interest of the Naga people. We are seriously critical of such people or group as they do not contribute towards finding lasting political solution," the National Socialist Council of Nagaland (Isak-Muivah) said.
The Naga group said the decision taken by the Centre and Election Commission to hold polls is bound to undermine the progress of the ongoing talks between the NSCN-IM and the central government and become serious obstacle towards finding an early political solution.
"We, therefore, reiterate our position for an early solution that will usher in peace in the whole subcontinent and the Government of India must exercise political will and take steps accordingly," it said.
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The NSCN-IM said the Nagas have sincerely come "very close" for political solution appreciating the steps taken by the Government of India in seeking political solution and leaving aside military solution.
Expectations for a lasting peace have soared in insurgency-hit Nagaland after signing of the framework agreement in 2015.
The NSCN-IM has been engaging in peace talks with the Centre's interlocutor since 1997, when it announced a ceasefire agreement after a bloody insurgency movement that began shortly after the country's independence.