Bangkok: Myanmar's military chief has warned against United Nations intervention in his country, declaring more than one million Rohingya Muslims in western Rakhine state as "Bengali" interlopers, despite them having lived there for generations.

Min Aung Hlaing​ also signalled his armed forces will shun a fact-finding mission into atrocities on Rohingya, following a motion co-sponsored by Australia at the UN Human Rights Council in Geneva last Friday, saying it would threaten Myanmar's sovereignty.

"We have already let the world know that we don't have Rohingya in our country," Senior-General Min Aung Hlaing told an Armed Forces Day parade in the capital Naypyidaw.

"The Bengalis in Rakhine state are not Myanmar citizens and they are just people who came to stay in our country," he said, using a derogatory term for Rohingya.