The Nationalist Democratic Progressive Party (NDPP), which rules Nagaland in alliance with the BJP, won the by-election to the Tapi Assembly constituency in the Mon district on Sunday, December 3.
The by-poll was held on November 7.
NDPP candidate Wangpang Konyak defeated Congress rival Wanglem Konyak by 5,333 votes. The former polled 10,053 votes while the latter managed 4,720.