They also recommended that the matter be referred to the International Criminal Court or another special tribunal.
It raises the remarkable prospect that the Nobel Peace Prize victor could see her own generals put on trial for crimes against humanity. Facebook said this type of "coordinated inauthentic behavior" is banned on the social network.
But in a trial that has commanded an worldwide spotlight and is widely seen as a litmus test for the civilian government's relationship with the press, the delay was widely perceived to have political motivations, especially as the decision comes on the eve of the U.N. Security Council briefing on Myanmar.
Myanmar government spokesmen Zaw Htay was unavailable for comment on Sunday.
Reuters was unable to contact Min Aung Hlaing on Monday.
About 700,000 Rohingya fled to neighboring Bangladesh after the crackdown began last August, and Myanmar's army has been accused by human rights groups and United Nations experts of committing massive human rights violations amounting to ethnic cleansing, and possibly genocide.
Some 700,000 Rohingya fled the crackdown and most are now living in refugee camps in neighboring Bangladesh.
"The crimes in Rakhine state, and the manner in which they were perpetrated, are similar in nature, gravity and scope to those that..." Such a designation is rare, but has been used in countries including Bosnia, Rwanda and Sudan.
"In Rakhine State, the elements of the crimes against humanity of extermination and deportation are also present", it said.
Marzuki Darusman, chair of the panel, said commander-in-chief Min Aung Hlaing should step down pending investigation.
Both accounts were taken down immediately as the explosive United Nations report circulated.
Christopher Sidoti, an Australian human rights expert, acknowledged that no "smoking gun" linked the six military leaders directly to orders to carry out genocide, but pointed to inferences of their role based on a strict chain of command in Myanmar.
The list of generals also included Brigadier-General Aung Aung, commander of the 33rd Light Infantry Division, which oversaw operations in the coastal village of Inn Din where 10 Rohingya captive boys and men were killed.
"The verdict will be announced on Sep 3", said district judge Khin Maung Maung in a swift hearing at a courthouse in Yangon, adding that the presiding judge was sick.
The ban included two pages dedicated to the army's commander-in-chief, Senior General Min Aung Hlaing, that have been the military's primary outlet for information, especially around the crisis in the western state of Rakhine previous year.
The crimes documented in Kachin, Shan and Rakhine include murder, imprisonment, torture, rape, sexual slavery, persecution and enslavement that "undoubtedly amount to the gravest crimes under global law". The group says, however, as with most cases of genocide, there is no "smoking gun".
The panel, set up previous year, interviewed 875 victims and witnesses in Bangladesh and other countries, and analyzed documents, videos, photographs and satellite images.
"The result is a continuing situation of severe, systemic and institutionalised oppression from birth to death", the investigators say.
Speaking in Singapore last week, Ms. Suu Kyi said the military had acted in response to terrorist attacks and said she had a good relationship with Myanmar's generals.
The UN report singled out Facebook for its "slow and ineffective" response. In the same post, Facebook said the move was meant to prevent inflammatory posts from these accounts. It said it was deleting 18 Facebook accounts, one Instagram account and 52 Facebook pages.
"A year ago, following deadly militant attacks, security forces responded by launching abhorrent ethnic cleansing of ethnic #Rohingya in Burma", Pompeo said on Twitter, using an alternative name for Myanmar.
Facebook is taking action to prevent the "spread of hate and misinformation" in Myanmar.
"While we were too slow to act, we're now making progress", the company said.