An Ethiopian Airlines jet crashed minutes after departing Addis Ababa, killing all 157 aboard—including eight Americans and 18 Canadians—leading to an unusually swift reaction regarding Boeing Co. ’s 737 MAX in the wake of the second deadly disaster involving the new model in recent months.

China’s Civil Aviation Administration ordered the temporary grounding of all Boeing 737 MAX aircraft—which is in growing use in the U.S. and abroad—flown by Chinese airlines. Ethiopian Airlines said early Monday it grounded its MAX aircraft as well, as an “extra safety precaution” despite not knowing the cause of the crash. Cayman Airways, a small operator with two 737 MAX planes, said on its website it would ground those planes starting Monday until it gets more information. An Indonesian official told The Wall Street Journal that authorities are planning to meet Monday to discuss whether to ground the aircraft there. And a flight attendants union called for an FAA investigation.

Shortly after taking off on Sunday, the jetliner’s pilot reported an unspecified problem with the plane and asked to return to the Ethiopian capital’s Bole International Airport. Six minutes after departure, communication was lost, and the plane plunged to the ground near Bishoftu, just south of Addis Ababa.

A number of people on board Flight 302 to Nairobi were heading to a global United Nations Environment Program summit. The U.N.’s World Food Program also had multiple staff members on the flight, said its head, David Beasley.

Citizens from many nations were among those on the aircraft, in addition to the Americans and Canadians, including French, Chinese and British nationals, said Kenyan Transport Minister James Macharia. The largest loss of life was from Kenya, with 32 deaths.