As of midday Tuesday, Eastern time, the following countries had grounded the 737 MAX or banned it from their airspace: Australia, Britain, China, France, Germany, Indonesia, Ireland, Malaysia, Mongolia, Oman, and Singapore. The following airlines had grounded their 737 Max 8 fleets: Aeromexico, Brazil’s Gol Airlines, Aerolineas Argentinas, Cayman Airways, South Africa’s Comair, South Korea’s Eastar, Ethiopian Airlines, Icelandair, Norwegian Air Shuttle, India’s Jet Airways, Morocco’s Royal Air Maroc, and Turkish Airlines.

Noting “similarities” between the two accidents, China’s Civil Aviation Administration said operation of the model would only resume after “confirming the relevant measures to effectively ensure flight safety”.

China is a hugely important market for the US aircraft company, accounting for about one-fifth of worldwide deliveries of Boeing 737 MAX models.

A spokesman for the UK civil aviation authority said: “As we do not currently have sufficient information from the flight data recorder we have, as a precautionary measure, issued instructions to stop any commercial passenger flights from any operator arriving, departing or overflying UK airspace.”

There are currently five 737 Max aircraft registered and operational in the UK. A sixth is planned to commence operations later this week.

Turjey’s national carrier Turkish Airlines said on Tuesday it was suspending flights using its fleet of 12 Boeing 737 MAX aircraft.

“Until the uncertainty surrounding the safety of the 737 MAX is clarified, we are withdrawing these planes from commercial flights from March 13,” airline boss Bilal Eksi said on Twitter.

Oman said on Tuesday it was “temporarily suspending” all flights by Boeing 737 MAX aircraft in the sultanate.

Oman’s Public Authority for Civil Aviation made the announcement, without elaborating on its reasoning.

State-owned Oman Air, which operates five Boeing 737 MAX 8 aircraft, said flights operated by those planes “will be suspended as soon as possible”.

“We are in the process of making the necessary rescheduling and will advise our guests of any flight cancellations,” the airline said.

The aviation regulator in Malaysia announced late on Tuesday that it was “suspending the operations of the Boeing 737 MAX 8 aircraft flying to or from Malaysia and transiting in Malaysia until further notice”. It added that no Malaysian airline uses the Boeing 737 MAX 8.

Indonesia, where a Boeing plane of the same model crashed in October, said it was grounding its 11 jets of the 737 MAX 8 type.

Inspections of the aircraft would start Tuesday and the planes would remain grounded until they were cleared by safety regulators, Director General of Air Transport Polana Pramesti told reporters.

10 of Indonesia’s Max 8 jets are operated by Lion Air while the other is flown by national carrier Garuda.

South Korean budget carrier Eastar Jet will temporarily ground its two 737 MAX 8s from Wednesday to better cooperate with the government’s required emergency safety inspections, an airline spokesman said on Tuesday.

The Mongolian Civil Aviation Authority said on Facebook it had ordered the state carrier MIAT Mongolian Airlines to ground the sole Boeing 737 MAX 8 aircraft in its fleet

The suspension will affect SilkAir, a regional carrier that’s wholly owned by Singapore Airlines. It has six Boeing 737 Max 8 planes.

The authority said that flights to Singapore by China Southern Airlines, Garuda Indonesia, Shandong Airlines and Thai Lion Air will also be affected.

Australia’s civil aviation safety authority suspended Boeing Co 737 MAX aircraft from flying to or from Australia.

“This is a temporary suspension while we wait for more information to review the safety risks of continued operations of the Boeing 737 MAX to and from Australia,” Australia’s Civil Aviation Safety Authority CEO Shane Carmody said in a statement.

Fiji Airways is the only 737 MAX operator affected by the Australian ban, according to CASA. Singapore-based SilkAir used the planes for flights to Australia, but those were already suspended after the city-state barred the model from its airspace.

Ethiopian Airlines said Monday it had grounded its Boeing 737 MAX 8 fleet.

“Following the tragic accident of ET 302 … Ethiopian Airlines has decided to ground all B-737-8 MAX fleet … until further notice,” the state-owned carrier said.

“Although we don’t yet know the cause of the accident, we have to decide to ground the particular fleet as an extra safety precaution,” said the airline, Africa’s largest.

Norwegian Air Shuttle grounded its Boeing 737 MAX 8 aircraft on Tuesday, saying it was in response to a recommendation from European aviation authorities.

Royal Air Maroc has temporarily grounded its MAX 8s.

South African airline Comair said it had “decided to remove its 737 MAX from its flight schedule”.

Cayman Airways said it would suspend flights for its two 737 MAX 8 planes “until more information is received”, CEO Fabian Whorms said.

The Mexican airline Aeromexico said it would temporarily ground its six 737 MAX jets until it has more information about the Ethiopian Airlines disaster. Hours earlier, Aeromexico said it was confident in its MAX fleet and the aircraft were in perfect condition.

Brazil’s Gol Airlines is suspending the use of its six Boeing 737 MAX aircraft, but said was fully confident in Boeing’s safety operations.

Gol says that since it started using the Boeing 737 MAX 8 last June, the aircraft have made nearly 3,000 flights with “total security and efficiency”.

India’s Jet Airways on Tuesday said has grounded its five 737 MAX planes and is “in contact with the manufacturer”. However, Jet’s MAX planes have been grounded for some time after failing to keep up payments with aircraft leasing companies.

On Monday, India’s aviation watchdog said it ordered a safety assessment of the aircraft. It also issued safety instructions for flying Boeing 737 MAX 8 aircraft.

The directions call for the pilot-in-command to have at least 1,000 hours of flying experience and the co-pilot to have 500 hours on Boeing 737 NG type aircraft.

Indian airline SpiceJet also has Boeing 737 MAX 8 aircraft, which it flies to Hong Kong. It’s unclear if those planes are grounded.

As the flagship US manufacturer comes under scrutiny, Federal Aviation Administration on Monday said it would take “immediate” action if there were safety concerns.

Southwest Airlines, which operates 34 of the 737 MAX 8 planes, said: “We remain confident in the safety and airworthiness of our fleet of more than 750 Boeing aircraft.”

A person with knowledge of the matter said that American Airlines planned to continue operating flights aboard the company’s two dozen 737 MAX 8s as scheduled.

Republican Senator Mitt Romney called on the FAA to follow other countries and temporarily ground Boeing 737 MAX 8s.

“Out of an abundance of caution for the flying public, the (FAA) should ground the 737 MAX 8 until we investigate the causes of recent crashes and ensure the plane’s airworthiness,” Romney said in a tweet.

Russian airline S7 said it was closely following the ongoing investigation into the crash and was in contact with Boeing, but had received no instructions from the US plane maker to stop flying the 737 MAX 8.

Air Italy said it was in “constant dialogue with the authorities” and would follow all directives “to ensure the maximum level of safety and security”. In the meantime, the planes remained in the air.

Icelandair’s operations chief Jens Thordarson told Frettabladid that it would be “premature” to link the crashes in Ethiopia and Indonesia together.

For now, “nothing pushes us towards the slightest action”, he said.

This could change depending on the outcome of an ongoing probe but “for now, there is no reason to fear these machines”.

Icelandair operates three Boeing 737 MAX 8 and has options to buy more.

Airline flydubai said it was “monitoring the situation” but “confident in the airworthiness of our fleet”.

Fiji Airways says it will continue flying its two Boeing 737 MAX 8 planes to Pacific destinations.

Fiji’s national carrier said in a statement Tuesday it’s following the situation closely and has full confidence in the airworthiness of its fleet.