Influential cleric Wirathu rained insults on United Nations Special Rapporteur on Myanmar Yanghee Lee in a firebrand speech to cheering supporters, calling her a "whore in our country" for criticising controversial draft bills considered discriminatory to women and minorities.
The UN's human rights chief said the comments, which come amid rising Buddhist nationalism in diverse but conflict-prone Myanmar, were "intolerable", in a strongly-worded statement to the former junta-run nation.
He called on religious and political leaders in the country "to unequivocally condemn all forms of incitement to hatred, including this abhorrent public personal attack against a UN-appointed expert".
Myanmar president's office spokesman Zaw Htay said the religious affairs ministry had been asked to look into the "rude and harsh" comments, but he indicated the government was unlikely to take action against the monk.
"We have not received any official complaint yet. And since it is a monk issue, we can't deal it with directly," he told AFP.
But the country, which began emerging from outright military rule in 2011, has seen a surge in religious tensions in recent years, with spates of violence targeting Muslim minorities that have raised doubts over its much vaunted reforms after decades of harsh military rule.
Wirathu, who has become the country's most recognised Buddhist hardliner, was unapologetic about his remarks when contacted by AFP this week, despite a flurry of criticism over his language on social media.
The monk's speech came after Lee said controversial draft legislation -- including curbs on interfaith marriage, religious conversion and birth rates -- would be a further sign that Myanmar was "backtracking" in its democratic reforms if passed by parliament.
