The Federal Aviation Administration said on Thursday that Denver air traffic control lost communications for about two minutes on Monday but was able to maintain contact through an emergency frequency.

The Federal Aviation Administration is investigating the cause of an outage that interfered with communication between pilots and its air traffic control center in Longmont earlier this week.

The FAA is under scrutiny following communication failures in Denver's air traffic control, highlighting ongoing concerns about the aging infrastructure of the air traffic control network. Despite a brief loss of communication,