Relatives of those killed when an Ethiopian Airlines 737 Max aircraft crashed shortly after take-off from Addis Ababa are due to take part in a memorial service, a year after the accident took place.

The private ceremony will be held at the scene of the disaster.

All 157 people on board were killed when the plane came down, months after a similar tragedy in Indonesia.

On Monday, an interim report by Ethiopian investigators identified faulty sensors and inadequate training as possible causes of the disaster.

The crashes have cost the manufacturer, Boeing, billions of dollars and led to the worldwide grounding of 737 Max aircraft.