Australia and Singapore have suspended the Boeing 737 Max 8 passenger jet from operating in their respective airspaces, joining a growing list of countries taking precautionary measures involving the troubled plane after its second fatal crash in five months.

Airlines across the globe, including China, Indonesia, Brazil and Mexico, have grounded all the 737 Max 8 jets in their respective fleets after 157 passengers and crew were killed when a 737 Max 8 operated Ethiopian Airlines crashed Sunday shortly after taking off from Addis Ababa.

Statements from both Australia’s and Singapore’s civil aviation authorities say the suspensions are temporary while the investigation into Sunday’s tragedy continues. The suspensions affect Fiji Airlines and Singapore’s SilkAir, which was already suspended from operating by the city-state.

FILE - Rescue team members prepare the boat heading to the location of Lion A
FILE – Rescue team members prepare the boat heading to the location of Lion Air, flight JT610, plane crash off the coast of Karawang regency, West Java province Indonesia, Oct. 29, 2018.

The Ethiopian Airlines Max 8 was the same model as the one that crashed into the Java Sea in October, just minutes after taking off from Jakarta, killing 189 people.

At least two witnesses say they saw smoke coming from the back of the plane before it crashed.

Investigators have found the flight data recorder and the cockpit voice recorder, which they hope will give them clues as to why the Boeing 737 Max 8 jet went down en route to Nairobi.

Indonesian investigators said information from the flight data recorder showed the plane’s automatic safety system repeatedly pushed the plane’s nose downward despite the pilots’ desperate attempts to maintain control.

Tributes and condolences poured in Monday for the victims of Sunday’s crash, who hailed from at least 35 different countries and included 22 United Nations staff members heading to a U.N. environmental conference in Nairobi.

Flags at the conference were lowered to half-staff Monday. The Nairobi conference and a General Assembly meeting in New York both opened with moments of silence.

“A global tragedy has hit close to home, and the United Nations is united in grief. I extend my deepest condolences to the families and loved ones of all the victims, to the government and people of Ethiopia, and all these affected by this disaster,” Secretary General Antonio Guterres said in New York.

Delegates at the United Nations Environment Programme (UNEP) world environmen
Delegates at the United Nations Environment Programme (UNEP) world environmental forum observe a minute’s silence in memory of the victims of Ethiopian Airlines Flight ET 302 plane crash, at the UN complex within Gigiri in Nairobi, Kenya, March 11, 2019.

The victims were also remembered at U.N. refugee headquarters in Geneva and at the State Department in Washington.

Menur Nur Mohamed lost his brother Ahmed on the doomed plane. Ahmed Nur Mohamed was the co-pilot.

“Me and my brother grew up together. He wasn’t only my brother, but also my friend,” Mohamed told Tsion Tadesse of VOA’s Horn of Africa service.

Mohamed said he learned of his brother’s death when the head of Ethiopian Airlines mentioned his name.

Boeing shares plunged seven percent Monday on Wall Street.