As per Anadolu news agency, the request comes after the military admitted to the killing of 10 Rohingyas in the war-ravaged Rakhine state.
Ten Rohingya Muslims whom the Myanmar military had admitted to killing in Rakhine state on September 2 past year were "innocent civilians" and not militants as the Myanmar government claimed, the rebel group Arakan Rohingya Salvation Army (ARSA) said on Saturday.
"We hereby declare that these ten innocent Rohingya civilians found in the said mass grave in Inn Din Village Tract were neither ARSA nor had any association with ARSA", the group said in a statement on Twitter.
The Rohingya crisis erupted after Rohingya insurgent attacks on security posts in Rakhine on August 25 triggered a fierce military response that the United Nations denounced as ethnic cleansing.
The European Union (EU) urged Myanmar to allow the United Nations (UN) to access the country for conducting the probe into the Rohingya assaults reported so far.
The request comes after Myanmar military admitted that some of its soldiers were involved in the murder of 10 captured Rohingya men in western Rakhine state in September a year ago and buried them in a mass grave near Inn Din village in Maungdaw township.More news: Google May Revamp Online Store To Focus On Google Assistant
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Myanmar's Ministry of Information has blamed Rohingya militants for the violence in Rakhine. The return of the Rohingya is expected to begin as early as January 23.
It labeled the 400 dead as "extreme terrorists" who died during military "clearance operations".
In response to the Myanmar's military's admission of killing Rohingya Muslims, Amnesty International said that the confession is just the tip of the ice berg.
In a district on the border with Bangladesh, Kono viewed the planned return route for hundreds of thousands of Rohingya refugees, including a small bridge close to the border under tight security control.
Aung San Suu Kyi thanked Japan for its support after the country announced on Friday it would give a total of 23 million dollars, subject to parliamentary approval, for rehabilitation of refugees and improving humanitarian conditions in Rakhine State.