Federal Aviation Administration ( The FAA) in the US has ordered the suspension of all flights at the launch of American airports, citing extraordinary circumstances and security reasons.
The unusual decision comes after the agency reported serious problems in air traffic control systems.
Due to extraordinary circumstances and for security reasons, by order of the Federal Air Command Centre, all airports have been ordered to stop the launch of planes, the FAA report said.
The agency has instructed that all aircraft waiting to leave on land until a second announcement, while international flights arriving in the US will be treated individually, case by case.
Just before the national mass was declared, The FAA had suspended air traffic in Chicago due to communications problems.
According to CBS News, a similar command for stopping departures was issued for the Midway International Airport.
It has not yet been disclosed how long the suspension will last and when normal air traffic operation is expected to be restored.
The decision is expected to cause significant disruptions in air transport across the US. /Telegraphy/