"This continuing campaign of distortion and disinformation about the investigation, as well as the insidious attempts to prevent possible bona fide witnesses from submitting information to the investigating team, is an affront to the United Nations Human Rights Council which mandated the investigation," said UN High Commissioner for Human Rights Zeid Ra'ad Al Hussein.
He criticised the continuing attacks by the government on the integrity of the UN Human Rights Office's ongoing investigation into the alleged grave human rights violations and abuses in Sri Lanka and condemned the intimidation of human rights defenders and individuals who may wish to cooperate with the investigation.
"The Government of Sri Lanka has refused point blank to cooperate with the investigation despite being explicitly requested by the Human Rights Council to do so," Zeid said.
"Such a refusal does not, however, undermine the integrity of an investigation set up by the Council - instead it raises concerns about the integrity of the government in question. Why would governments with nothing to hide go to such extraordinary lengths to sabotage an impartial international investigation?" he said.
"Since the end of the conflict in 2009, Sri Lanka has continued to obstruct any independent investigation despite the persistent, compelling and widespread allegations that possible serious international crimes were committed by both sides during the conflict in Sri Lanka," Zeid said.
The Human Rights Council had adopted a resolution in March requesting the office of the high commissioner for human rights "to undertake a comprehensive investigation into alleged serious violations and abuses of human rights and related crimes by both parties in Sri Lanka."
The Council also requested the High Commissioner to present a comprehensive report resulting from that investigation to its 28th session in March, 2015.
Sri Lanka dubs the UN investigation as one which impedes its sovereignty. The UNHRC resolution had alleged war crimes blamed on both government troops and LTTE rebels during the final phase of the nearly three decades-long civil war. The UN says 30,000 people were killed towards the end of the ethnic conflict in 2009 when the Liberation Tigers of Tamil Eelam (LTTE) was finally crushed.
By Yoshita Singh