(NewsNation) — The Federal Aviation Administration is experiencing a computer failure that has the potential to impact all flights nationwide, an advisory from the Air Traffic Control System Command Center said.

The FAA said it is working to restore its Notice to Air Missions System — responsible for communicating flight hazards and real-time restrictions to pilots — but there is no current time of restoration.

“We are performing final validation checks and reloading the system now,” the FAA tweeted. “Operations across the National Airspace System are affected.”

The FAA said the outage means that no flights are able to be released, and airports across the nation are already reporting delays.

“United has temporarily delayed all domestic flights and will issue an update when we learn more from the FAA,” United Airlines said in a statement.

This is a breaking news story. Check back for updates.