The man was a WHO employee who worked as a driver.

The BBC's Southeast Asia correspondent Jonathan Head reports that the car, marked as a UN vehicle, had been collecting Covid-19 samples and was on the way back to Yangon when the attack took place on Monday.

The incident occurred in an area which has seen several clashes between the military and insurgents from the Arakan Army, who have escalated their campaign for self-rule in Rakhine state in the past two years, our correspondent says.

One of the poorest regions in the country, Rakhine State relies heavily on international assistance.