The Federal Aviation Administration ordered a nationwide ground stop on Friday for all airlines, according to ABC News. That outlet reported that the order was issued "due to extraordinary circumstances and for reasons of safety."

The Hill reported that Transportation Secretary Sean Duffy confirmed the stop on Friday and that it covered all U.S. flights. The outlet quoted Duffy's post on the social platform X, in which he said the stop followed "a communication issue impacting all Air Route Traffic Control Centers." The Hill also reported that FAA technicians were investigating the problem.

CBS News reported that the FAA issued the ground stop on Friday, describing it as rare, and that it applied to all departing flights, according to Duffy.

The accounts differ on the scope of the order. ABC News described it as applying to all airlines, The Hill described it as applying to all U.S. flights, and CBS News described it as applying to all departing flights. The summaries of these reports do not say whether arriving flights were affected.

The summaries also do not say when the ground stop would be lifted or whether the FAA had identified the cause of the communication issue beyond what Duffy described. Neither ABC News, The Hill nor CBS News has provided further details in the material available for this report, and the investigation described by The Hill had not been reported as concluded.

Sources: ABC News: Nationwide ground stop ordered at airports: FAA; The Hill: FAA orders nationwide ground stop; CBS News: FAA issues nationwide ground stop.