From a New York Time story by Abdi Latif Dahir headlined “Ethiopian Airlines Pilots Miss Landing After Reportedly Falling Asleep”:

NAIROBI, Kenya — Two pilots with Africa’s largest airline reportedly fell asleep at the controls and missed their window to land while flying into Ethiopia’s capital, Addis Ababa, on Monday, according to an aviation news site.

The Ethiopian Airlines pilots were operating a Boeing 737-800 from Khartoum, the capital of Sudan, when they reportedly fell asleep at 37,000 feet and were unable to be reached by air traffic control, according to a report by The Aviation Herald.