A "telephonic bomb threat" forced a Southwest flight headed towards Austin, Texas to make an emergency landing in Phoenix.
FBI spokesman Manuel Johnson said Monday night that Southwest Airlines flight 2675 had been searched by Phoenix police and FBI bomb technicians and that no explosive device was found.
The FBI said a "telephonic bomb threat" forced the flight headed to Austin, Texas to make an emergency landing in Phoenix Monday afternoon.
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The plane, carrying 143 passengers, landed safely and all passengers deplaned and were questioned by authorities.
They said the flight "departed LAX at 2:12pm and was diverted to Phoenix for further investigation."
The FBI says they are responding, along with law enforcement partners "to conduct an investigation of the aircraft, as well as to determine the person/s responsible for the threat."
Air15 video showed passengers being removed from the plane and being boarded onto a bus.
Southwest airlines spokesperson Katie McDonalds said the pilot became aware of a "security concern" and asked to land in Phoenix.
Michael Kucharek of NORAD confirmed to ABC15 that two F-16 fighter jets were dispatched from Tucson to "monitor" the plane from the air and ensure it landed safely.
A spokeswoman with Southwest Airlines said the passengers would be booked on other flights.
Sky Harbor spokeswoman Julie Rodriguez said flights continued to arrive and depart, but some flight delays resulted.
Roadway traffic on the west end of the airport was restricted for several hours but the restrictions have now been lifted.
Rodriguez advises anyone with a flight or who is picking up a passenger to check the flight status before heading to the airport.
Johnson said the FBI's investigation is ongoing and efforts are being made to identify the caller who initiated the bomb threat.