An Ethiopian Airlines jet has crashed shortly after take-off from Addis Ababa, killing all on board, the airline says.

It said 149 passengers and eight crew members were believed to be on flight ET302 from the Ethiopian capital to Nairobi in Kenya.

The airline added that there were 33 different nationalities on board.

The crash happened at 08.44 local time, six minutes after the months-old Boeing 737 Max-8 took off.

It is not yet clear what caused the accident.