Mesa Air Group says it has suspended two pilots of a go! airlines flight that overshot the runway in Hilo, Hawaii.

The Federal Aviation Administration and the airline are investigating whether the pilots had fallen asleep during the incident last week.

The morning flight from Honolulu turned back and landed safely after overshooting the Hilo airport by 15 miles.

Officials said air traffic controllers tracking the plane by radar were unable to contract the cockpit for 25 minutes.

Mesa has not released identity of the suspended pilots but a spokesman says the captain has had more than 15 years of flying experience.

An airline internal memo says the company takes seriously any occurrence which has the potential of adversely affecting normal operations of a flight.