New Delhi: The main opposition DMK has constituted a three-member committee to identify the reasons for its failure in the high-stake RK Nagar byelection.

Rival AIADMK leader TTV Dhinakaran, who contested as an independent, won the by poll securing 89,013 votes against ruling AIADMK nominee and nearest rival E Madhusudhanan's 48,306 votes.

DMK's N Maruthu Ganesh came third securing 24,651 votes, in the process, losing deposit.

The three-member panel, constituted on the directions of DMK Working President M K Stalin, would comprise its Whip in the Assembly R Sakrapani, legal wing secretary R Girirajan and Assistant Secretary VeKannadasan, a party statement said.

The committee had been directed to submit its report before December 31 next, it added.

The bypoll was held to fill the vacancy caused by the death of sitting member and then chief minister Jayalalithaa on December 5 last year and DMK had hoped for a win for it.

In its reaction to the poll outcome, DMK had attributed the victory of Dhinakaran to "money power" and claimed it was "a Himalayan defeat for the Election Commission rather than the DMK candidate".

The AIADMK has alleged there was a 'tacit understanding' between DMK and Dhinakaran to defeat the ruling party.