Myanmar's military has launched an internal probe into the conduct of soldiers during a counteroffensive that has sent more than half a million Rohingya Muslims fleeing to Bangladesh, many saying they witnessed killings, rape and arson by troops.

Coordinated Rohingya insurgent attacks on 30 security posts on Aug. 25 sparked a ferocious military response in the Muslim-majority northern part of Rakhine state that the United Nations has said was ethnic cleansing.

A committee led by military Lieutenant-General Aye Win has begun an investigation into the behavior of military personnel, the office of the commander in chief said Friday, insisting the operation was justified under Buddhist-majority Myanmar's constitution.