The ​US Federal Aviation ‌Administration on Friday issued a national ground stop "due to ​extraordinary circumstance and ​reasons for safety" after the agency ⁠earlier reported serious ​air traffic control communications ​issues.

Shortly before the announcement, the FAA halted traffic in Chicago ​due to air ​traffic control communications issues. The agency ‌said, "All ⁠departing traffic should remain groundstopped until further notice." The FAA said ​international flights ​will ⁠be managed on a case-by-case basis.

The ​FAA did not ​immediately ⁠respond to a request for comment.

Source: reuters.com