ADDIS ABABA, Ethiopia (AP) — The Latest on Ethiopian Airlines crash (all times local):

12 p.m.

The U.N. office in Nairobi is joining Ethiopia in mourning the 157 dead in Sunday's Ethiopian Airlines crash shortly after takeoff from Addis Ababa.

A moment of silence and U.N. flags at half-staff marked the deaths that included several workers with U.N. and affiliated organizations.

The U.N. resident coordinator in Nairobi, Siddharth Chatterjee, says that "This has taken us by shock. ... But it also goes to reinforce the mortality of human life and therefore reinforces the need for humanity."

He says U.N. Secretary-General Antonio Guterres sent "a poignant message of condolences to everybody, not just the U.N. staff but the crew of the flight and all other nationalities which were on the plane."

People from 35 countries died.

10 a.m.

A spokesman says Ethiopian Airlines has grounded all its Boeing 737 Max 8 aircraft as a safety precaution, following the crash of one of its planes in which 157 people were killed.

Asrat Begashaw said Monday that although it is not yet known what caused the crash on Sunday, the airline decided to ground its remaining four 737 Max 8 planes until further notice as "an extra safety precaution." Ethiopian Airlines was using five new 737 Max 8 planes and was awaiting delivery of 25 more.

Begashaw said searching and digging to uncover body parts and aircraft debris will continue. He said forensic experts from Israel have arrived in Ethiopia to help with the investigation.