The FBI has questioned 151 passengers from a Delta Airlines flight from Detroit to Denver after a potential security threat.
"The majority of the Delta Flight 1500 passengers have been allowed to claim their luggage and continue with their travel plans," FBI spokesman Dave S. Joly said.
The screening took place on Friday at a remote location at the Denver airport and it delayed the arrival of passengers at the terminal by about four hours.
A law enforcement official told CNN that a bomb threat found written on a note prompted the security screening after the plane landed at Denver International Airport.
The Boeing 737 aircraft, which was carrying 151 passengers and six crew members, landed safely as scheduled, said Russell Cason, a spokesman for Delta.
