The U.N. chief lent credence Friday to the possibility of war crimes in Sri Lanka, saying an international investigation is needed to examine the military actions of the government and defeated Tamil Tiger rebels during the civil war. Secretary-General Ban Ki-moon, at a closed-door briefing for Security Council members, called for a credible inquiry to be undertaken with international backing and full support from Sri Lanka's government, according to a report of Associated Press. «Any inquiry, to be meaningful, should be supported by the members of the United Nations, and also should be very impartial and objective,» Ban told reporters Friday at U.N. headquarters. «I would like to ask the Sri Lankan government to recognize the international call for accountability and full transparency,» he said. «And whenever and wherever there are credible allegations of violations of humanitarian law, there should be a proper investigation.»