"They have demanded recognition as Rohingya, which has never been an ethnic group in Myanmar. Bengali issue is a national cause and we need to be united in establishing the truth," reads a post on Senior General Min Aung Hlaing's official Facebook page.
There were 93 clashes in the violence of extremist Bengalis that started to break out on Aug 25, it quoted the army chief saying.
"The violence was an organised attempt of extremist Bengalis in Rakhine State to build a stronghold in Buthidaung and Maungtaw," the post read.
Since late August, more than 400,000 Rohingyas have crossed the border into neighbouring Bangladesh as the army continues its crackdown on insurgents, who attacked 30 police outposts and an army base in northwestern Rakhine state.
The UN has described the military campaign as a "textbook example of ethnic cleansing" of Rohingyas while the Security Council in a statement called for an immediate end of violence.
The crisis leading to the exodus of Rohingyas has left Myanmar’s de-facto head of state Aung San Suu Kyi in a difficult position.
She skipped the UN General Assembly amid critics calling to strip of her Nobel peace prize for failing to do enough to stop the humanitarian crisis.
"Perhaps she's got more pressing matters here to deal with," spokesman Aung Shin told Reuters on Sept 13.
As the influx of Rohingyas continues, pressure is mounting on Myanmar with the UN chief saying Suu Kyi must act now.
"If she does not reverse the situation now, then I think the tragedy will be absolutely horrible, and unfortunately then I don't see how this can be reversed in the future," he said during an interview with BBC’s HARDtalk programme.
Guterres reiterated that the Rohingyas should be allowed to return to Myanmar.