Tamil Nadu, Nov 6 (ANI): Protesters in Tamil Nadu demanded India not to attend the Commonwealth Heads of Government Meeting (CHOGM) in Colombo and urged the United Nations to intervene in the matter. According to media reports, Prime Minister Manmohan Singh is yet to decide as to whether he would participate in the Commonwealth summit or not, which will be held in Colombo from November 15 to November 17. The protesters in Coimbatore took to the roads, shouting slogans and set an effigy on fire in the middle of the road, blocking the movement of vehicles.