RNA - Tens of thousands of Muslim Rohingya have fled their homes since a bloody crackdown by the Myanmar army in the western state of Rakhine sparked by a string of deadly attacks on police border posts in early October.
"The fact that only one particular ethnicity is being driven out is by definition ethnic cleansing," Malaysia's foreign ministry said in an unusually strongly-worded statement reported by AFP.
Myanmar has balked at such criticism, saying the Rakhine crisis is an internal issue, but international pressure on the country is mounting.
Malaysia's statement noted that hundreds of thousands of Rohingya have fled to neighboring countries in recent years – including some 56,000 to Muslim-majority Malaysia.
That, the statement said, "makes this matter no longer an internal matter but an international matter."
On Saturday morning, a convoy carrying the former UN chief arrived outside the Rohingya village of Wapeik, which has seen significant damage from fire.
Non state media journalists were stopped by police from coming close to the convoy or entering the village, an AFP photographer on scene said.
Annan is not expected to brief the media until Tuesday – after his visit to Rakhine ends.
Myanmar has restricted access to the northern part of the state and says its military is hunting down the militants behind the attacks.
But rights groups and Rohingya refugees who have made it to Bangladesh have accused the military of killing civilians and razing entire villages as a form of collective punishment.
The Rohingya have long faced persecution and government restrictions on movement that many have likened to apartheid.
Much of Myanmar views the Rohingya as illegal immigrants from Bangladesh even though many have lived there for generations.
Before the latest violence broke out, Myanmar's de facto civilian leader Aung San Suu Kyi formed a commission tasked with trying to solve the Rakhine crisis, headed by Annan.
That task has been made considerably harder since fighting broke out.
The Nobel Peace Prize winner has also been criticized for not defending the Rohingya.
Since winning a historic election last year, she has rarely spoken out on the issue.
But during a trip to Singapore this week she gave a rare interview in which she hit out at international criticism.
"I would appreciate it so much if the international community would help us to maintain peace and stability, and to make progress in building better relations between the two communities, instead of always drumming up cause for bigger fires of resentment," Suu Kyi told the state-owned Channel News Asia.
Her hands are somewhat tied by Myanmar's notoriously abusive military.
Under the country's junta-era constitution, the army still controls the key Home, Border and Defense ministries and has a parliamentary veto.
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