New Delhi, Sept 25: Congress today set up a three-member committee headed by L P Sahi, chairman of the party's Disciplinary Action Committee to go into complaints that senior leader K Karunakaran and his faction leaders reportedly worked against the party candidate in the just-concluded Ernakulam by-election in Kerala. AICC General Secretary R K Dhawan and Karnataka PCC President B Janardhana Poojary are the other members of the committee constituted by party president Sonia Gandhi. Bureau Report