Flights from Europe to the US have been suspended, Eurocontrol said, adding that the decision was made at the request of the US Federal Aviation Administration (FAA). The cause is communication problems at air traffic control centers.
On Friday, the FAA ordered a nationwide halt to flights. Aircraft already in the air were allowed to land, while departures remain banned.
According to a CNN source, the problems affect radars and the radio communication systems used by control centers. Bloomberg reported that the FBI does not believe a cyberattack or other criminal activity caused the failure. The bureau is checking whether a software update was to blame.
Homeland Security Secretary Markwayne Mullin said the public has no reason to be concerned. Nav Canada, the Canadian company that provides air traffic control, told Reuters that Canadian systems are working.
Around Prague, based on reporting by novinky.cz