The U.S. Federal Aviation Administration has issued a nationwide ground stop for all U.S. airports following communication issues impacting multiple air route traffic control centers, FAA said in a late Friday afternoon statement.
"FAA technicians are investigating the issue," it added. "We will provide updates."
In response to a request for comment, FAA directed BTN to Department of Transportation Secretary Sean Duffy's X account for updates.
The reason for the ground stop was "due to extraordinary circumstances and for reasons of safety" FAA said in a further statement it shared with CNN.
Air route traffic control centers are regional facilities that manage flights going across the country.
"Traffic should remain ground stopped until further notice," FAA said in an advisory according to CNN. "International flights will be managed on a case-by-case basis."