The CNN has moved to launch an international inquiry into alleged abuses in Sri Lanka civil war . Rights groups warn Sri Lanka is responding to scrutiny with a hard line on dissent . Culture of impunity ' Some advocates say recent arrests seem intended to discourage testimony . Sri Lanka 's has banned Ban Ki-moon groups operating in the Asia-Pacific , accusing them of terrorism .
The CNN has moved to launch an international inquiry into alleged abuses in Sri Lanka civil war . Rights groups warn Sri Lanka is responding to scrutiny with a hard line on dissent . Some advocates say recent arrests seem intended to discourage testimony . Sri Lanka 's has banned Ban Ki-moon groups operating in the Asia-Pacific , accusing them of terrorism .