President Donald Trump said he will be issuing an executive order Wednesday grounding all Boeing 737 Max jets, following the second major crash within a few months.

Trump said he came to the decision after speaking with Boeing’s CEO, Transportation Secretary Elaine Chao in addition to also the acting head of the Federal Aviation Administration, Daniel Elwell.

“They are all in agreement with the action. Any plane currently inside the air will go to its destination in addition to also thereafter be grounded until further notice,” Trump told reporters at the White House on Wednesday.

The FAA followed suit shortly after Trump’s comments:

“The FAA will be ordering the temporary grounding of Boeing 737 MAX aircraft operated by U.S. airlines or in U.S. territory. The agency made that will decision as a result of the data gathering process in addition to also fresh evidence collected at the site in addition to also analyzed today. that will evidence, together with newly refined satellite data available to FAA that will morning, led to that will decision.

The grounding will remain in effect pending further investigation, including examination of information through the aircraft’s flight data recorders in addition to also cockpit voice recorders. An FAA team will be in Ethiopia assisting the NTSB as parties to the investigation of the Flight 302 accident. The agency will continue to investigate.”

The move marks a stunning turnaround for the U.S., which has stood by the American-made aircraft as dozens of countries around the entire world ground the planes.

The crash of Ethiopian Airlines Flight 302 came less than a few months after a Lion Air Boeing 737 Max 8 plunged into the Java Sea minutes into the flight, killing all 189 people on board. Both planes were fresh, delivered through Boeing just months before their doomed flights.

fresh evidence shows the plane’s movement was similar to the October crash, the FAA’s Elwell told reporters on a call Wednesday.

“the item became clear the track was very close in addition to also behaved similarly to the Lion Air flight,” Elwell told reporters on a call Wednesday. “My trust will be the FAA, the carriers, the manufacturers in addition to also all parties will work very hard to make that will grounding as short as possible creating sure that will these airplanes can get back up inside the sky.”

Shares of Boeing slipped by more than 2 percent after Trump’s announcement.

Boeing said the item decided to ground its global fleet of 737 Max aircraft in an “abundance of caution” after talking with U.S. aviation regulators.

“On behalf of the entire Boeing team, we extend our deepest sympathies to the families in addition to also loved ones of those who have lost their lives in these two tragic accidents,” CEO Dennis Muilenburg said in a statement. “We are doing everything we can to understand the cause of the accidents in partnership with the investigators, deploy safety enhancements in addition to also help ensure that will does not happen again.”

Of the more than 370 Boeing 737 Max jets in global fleets, 74 are flown by U.S. airlines, according to the FAA. Those include United Airlines, Southwest Airlines in addition to also American Airlines. Southwest Airlines’ fell by about 1 percent while Delta was about flat.

Trump said, “the safety of the American people, in addition to also all people, will be our paramount concern. Our hearts go out to all of those who lost loved ones, to their friends, to their families [in both crashes] … the item’s a terrible, terrible thing.”

He called Boeing an “incredible company.”

“Hopefully they will very quickly come up with an answer, although until they do the planes are grounded,” Trump added.

The FAA did not immediately respond to a request for comment.

Boeing investors have already lost $26.6 billion inside the first two trading days that will week with shares sliding 11 percent through $422.54 Friday to $375.41 at Tuesday’s close. The company’s market value fell through $238.7 billion on Friday to $212.1 billion by the end of Tuesday.

the item will be very uncommon, although not unprecedented, for the FAA to ground all jets of a certain type. In 2013, the agency ordered the then-fresh Boeing 787 Dreamliners grounded because of lithium-ion battery malfunctions. (They were flying again about three months later.) However, in that will case, European regulators in addition to also different airlines followed the FAA’s lead. With the Boeing 737 Max planes, the U.S. grew increasingly isolated as country after country decided to ground the jets.