Ethiopian Airlines has grounded all of its Boeing 737 MAX 8 aircraft as "an extra safety precaution" following the crash of one of its planes in which 157 people were killed, a spokesman says.
Ethiopia on Monday (local time) marked a day of mourning and the search for remains began for a second day.
- China orders its airlines to suspend use of Boeing 737 MAX 8 aircraft - report
- Which airlines fly the Boeing 737 MAX 8 involved in fatal Lion Air and Ethiopian crashes
- Ethiopian Airlines crash has 'suspicious links' to October's Lion Air crash - aviation expert
Although it isn't yet known what caused the crash of the new plane in clear weather outside Addis Ababa on Sunday, the airline decided to ground its remaining four 737 Max 8s until further notice, spokesman Asrat Begashaw said.
Ethiopian Airlines had been using five of the planes and awaiting delivery of 25 more.
China's civilian aviation authority ordered all Chinese airlines to temporarily ground their MAX 8s, and Caribbean carrier Cayman Airways said it was temporarily grounding the two it operates.
After sunrise, Red Cross workers slowly picked through the widely scattered debris near the blackened crash crater, looking for the remains of 157 lives.
A shredded book. A battered passport. Business cards in multiple languages. Heavy machinery dug for larger pieces of the plane.
Asrat said forensic experts from Israel had arrived to help with the investigation. Ethiopian authorities lead the investigation into the crash, assisted by the US, Kenya and others.
People from 35 countries died in the crash six minutes after the plane took off from Ethiopia's capital en route to Nairobi.
Ethiopian Airlines said the senior pilot issued a distress call and was told to return but all contact was lost shortly afterward. The plane ploughed into the ground at Hejere near Bishoftu.
Kenya lost 32 people, more than any country.
Canada, Ethiopia, the US, China, Italy, France, Britain, Egypt, Germany, India and Slovakia all lost four or more citizens.
Leaders of the United Nations, the UN refugee agency and the World Food Program announced that colleagues had been on the plane.
Addis Ababa and Nairobi are major hubs for humanitarian workers, and some had been on their way to a large UN environmental conference set to begin in Nairobi.
The crash was strikingly similar to that of a Lion Air jet of the same Boeing model in Indonesian seas last year, killing 189 people.
The crash was likely to renew questions about the 737 Max 8, the newest version of Boeing's popular single-aisle airliner, which was first introduced in 1967 and has become the world's most common passenger jet.
Safety experts cautioned against drawing too many comparisons between the two crashes until more is known about Sunday's disaster.
The Ethiopian plane was delivered to the airline in November and it had flown just 1200 hours.