Nagaland Chief Minister Neiphiu Rio was Friday leading by around 30,000 votes in the lone Lok Sabha constituency in the state against Congress candidate K.V. Pusa.
Counting of votes is in progress.
Rio's Naga People's Front is part of the Bharatiya Janata Party-led National Democratic Alliance.
In all, three candidates, including an Independent, contested for the lone Lok Sabha seat of Nagaland.