All flights have been grounded at airports across America.

The Federal Aviation Administration (FAA) said the dramatic step was taken due to "extraordinary circumstances and for reasons of safety".

The agency earlier said it was suffering from air traffic control communication issues.

US Secretary of the Department of Transportation, Sean Duffy, confirmed the order came "following a communication issue impacting all Air Route Traffic Control Centers".

The last time a ground stop was issued across the USA was in January 2023, when a pilot notification system went down.

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