The United Nations today said its human rights envoy for Myanmar will probe escalating violence in the country, including a military crackdown on Rohingya Muslims.<br/><br/>UN special rapporteur Yanghee Lee has slammed the crackdown in Rakhine state as unacceptable and called for an investigation into claims that troops have raped, murdered and tortured civilians from the Muslim minority. Ms. Lee's 12-day trip, starting on Monday, will also take her to Kachin state, where thousands have been displaced by fighting between ethnic rebels and the army.<br/><br/>Myanmar's government says its troops in Rakhine are carrying out legitimate clearance operations to hunt down terrorists who attacked police border posts in October. On Wednesday an official commission probing the violence dismissed claims that security forces are trying to force the<br/><br/>Rohingya out of the country and said there was no evidence troops had carried out rape. But days earlier the government detained eight members of the police after a video emerged showing officers beating and kicking unarmed Rohingya villagers.<br/><br/>Intensifying clashes have undercut Aung San Suu Kyi's vow to bring peace to the country following her party's elevation to government last March. The Nobel prize winner has also faced strong international criticism for failing to rein-in the months-long military crackdown.