Boeing has grounded its entire global fleet of 737 Max aircraft after investigators uncovered new evidence at the scene of the fatal Ethiopian Airlines crash.The US plane-maker said it would suspend all 371 of the aircraft.
The Federal Aviation Administration said fresh evidence as well as newly refined satellite data prompted the decision to temporarily ban the jets.
The FAA had previously held out while many countries banned the aircraft.
The crash on Sunday in Addis Ababa killed 157 people.
It was the second fatal Max 8 disaster in five months after one crashed over Indonesia in October, claiming 189 lives.
The US is the latest country to suspend the Boeing 737 Max from flying after nations include the UK, the European Union, China, India and Australia all grounded the aircraft.Shares in Boeing ticked higher to $377 each following the announcement.
However, the company's market value has dropped by nearly $26bn since the crash in Ethiopia at the weekend.
American Airlines said 24 of its aircraft would be affected by the suspension.
United Airlines said that its Max aircraft account for roughly 40 flights a day.