The UN rights chief told AFP Monday that Myanmar had clearly "planned" the violent attacks on its Rohingya minority, causing a mass-exodus, and warned the crackdown could possibly amount to "genocide".

"For us, it was clear... that these operations were organised and planned," he said in an interview on the crackdown estimated to have killed thousands and forced more than 655,000 Rohingya to flee to neighbouring Bangladesh since August.

"You couldn't exclude the possibility of acts of genocide... You cannot rule it out as having taken place or taking place."

Source: AFP