The report contradicts consistent statements from ethnic Rohingya Muslim refugees now in Bangladesh - some with gunshot wounds and severe burns - who have described massacres, rape, looting and the burning of hundreds of villages by Myanmar's army and civilian mobs.
The army said 376 "terrorists" were killed in fighting after the August attacks.
The Myanmar military's report and its denunciation by Human Rights Watch came as US Secretary of State Rex Tillerson arrives in Myanmar on Wednesday. Tillerson will also meet other members of the Myanmar government and the head of the armed forces, Min Aung Hlaing, to propose actions and address the humanitarian crisis in Rakhine state and to offer USA support in the democratic transition of the Asian country, reports Efe news.
The U.N. humanitarian office said Tuesday that the number of Rohingya who have fled Myanmar to Bangladesh since August 25 has risen to 618,000.
"The Burmese military's absurd effort to absolve itself of mass atrocities underscores why an independent worldwide investigation is needed to establish the facts and identify those responsible", said Human Rights Watch's Brad Adams in a statement on Tuesday.
The founder of Live Aid says Suu Kyi is a "handmaiden to genocide" whose association with Ireland's capital "shames us all".More news: Sri Sri Ravi Shankar meets Adityanath over Ayodhya issue
Demands have been growing in the United States for Washington to impose economic and travel sanctions against the military and entities under its control over the Rohingya crisis.
Secretary Guterres said, "the dramatic movement of hundreds of thousands of refugees from Myanmar to Bangladesh, is a worrying escalation in a protracted tragedy and a potential source of instability in the region, and radicalization".
Canadian Prime Minister Justin Trudeau also he had an "extended conversation" with Suu Kyi about the plight of Rohingya Muslims.
"This is of tremendous concern to Canada and many, many other countries around the world".
More than 200 have drowned making the attempt in the past couple of months and Bangladesh border guards have clamped down on fishermen who Rohingya were paying to take them across.
The Nobel peace prize victor has failed to speak out strongly over the Rohingya's plight.More news: Serena Williams to Wednesday Alexis Ohanian this week
The Burmese government insists military action in Rakhine is a proportionate response to violence by militants.
The internal army report based its findings on interviews with about 2,800 people from so-called "Bengali villages" - implying the Rohingya in Rakhine State are from Bangladesh, not Myanmar.
"This is a major humanitarian crisis which looks like ethnic cleansing", she said in a speech in London.
The conversations in Myanmar could include consequences if the country's leaders can't formulate a "credible response" to the crisis that satisfies the worldwide community, the official said when asked if renewed sanctions were still under consideration.
Amnesty International also dismissed the military's internal investigation and called for a United Nations fact-finding mission and for other independent investigators to be given full access to Rakhine.More news: Razer's New BlackWidow Ultimate Keyboard Is Water-Resistant
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