ADDIS ABABA, Ethiopia — An Ethiopian Airlines flight crashed shortly after takeoff from Ethiopia’s capital on Sunday morning, killing all 157 people thought to be on board, the airline and state broadcaster said, as anxious families rushed to airports in Addis Ababa and the destination, Nairobi.

It was not immediately clear what caused the crash of the Boeing 737-8 MAX plane, which was new and had been delivered to the airline in November, records show.