Aye Lwin, a member of the government-appointed Advisory Commission on Rakhine State led by former United Nations chief Kofi Annan noted that State Counselor Aung San Suu Kyi has been working on implementing the commission's recommendations and repatriating refugees living in displacement camps in Bangladesh.
The Myanmar military and government have denied accusations that security personnel burned Rohingya villages and indiscriminately killed, tortured, and raped residents, despite testimony to the contrary by survivors and satellite imagery of the ravaged communities.
"We remain gravely concerned by continuing reports of violence and human rights abuses committed by Burmese security forces and vigilantes. Those responsible for abuses must be held accountable", she said.
The State Secretary praised Bangladesh for hosting Rohingyas who have fled Myanmar since the influx began on Aug 25.
Forced and early marriages are also taking place among the Rohingya population.
The developments came ahead of a visit on Wednesday by US Secretary of State Rex Tillerson.
In September, U.N. Secretary-General Antonio Guterres said the situation in Rakhine was best described as ethnic cleansing.More news: NCAA reverses ruling, grants NC State's Braxton Beverly immediate eligibility
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From Southeast Asia, leaders to take part in the summit are Philippines President Rodrigo Duterte, Myanmar's de facto leader and State counsellor Aung San Suu Kyi and Singaporean Prime Minister Lee Hsien Loong.
"And it is something for which the Burmese authorities - and especially the military - must take full responsibility". A Sky News team recently documented the mass migration of the Rohingya people from Rakhine State.
The statement was drawn up by the Philippines, current chair of the 10-member Association of Southeast Asian Nations (ASEAN) - which includes Myanmar - whose leaders met for a plenary session in Manila on Monday.
"Talks between Bangladesh and Myanmar on repatriation should continue", he said.
Since the beginning of the crisis, and beyond the end of violence, the United Nations chief reiterated his call for unhindered humanitarian access to affected communities; and the right to safe, voluntary and dignified return of those who fled, to their places of origin.
As people fleeing violence in Myanmar relate the horrors of escaping military violence, Myanmar army released a report late night Monday in which it concluded there were "no deaths of innocent people".
"After that, Myanmar will accept refugees back by forming joint committees", he said.