Human rights row overshadows Sri Lanka talks\n\nSri Lanka has warned British Prime Minister David Cameron that he has no right to raise the issue of human rights during his visit for the Commonwealth Summit.\n\nSri Lanka's information minister has accused Mr Cameron of raising questions about alleged war crimes during the conflict with Tamil Tiger rebels to secure the votes of Britain's Tamil community. \n\nJames Robbins reports from Colombo.\n\n\namerica