A United Airlines flight from Los Angeles to Vancouver was forced to make an emergency landing after an onboard passenger made a bomb threat.
Sources at San Francisco International Airport told local media that a passenger onboard flight UA1909 had made a bomb threat on Monday night, which officials quickly realised was not credible.
Investigators were said to have spoken to passengers who were onboard the flight.
Officials said that despite the bomb threat being deemed not credible, the plane, which was carrying 156 passengers and crew members, was still made to do an emergency landing.
Flight UA1909, an Airbus A320, was seen making an unexpected loop and heading to San Francisco just an hour after taking off from Los Angeles at around 7pm on Monday night.
The plane was carrying 156 passengers and crew from LA to Vancouver (Stock)
Flight UA1909 , was seen making an unexpected loop and heading to San Francisco just an hour after taking off from Los Angeles
The plane made the loop just over Lassen National Forest.
A United Airlines spokesperson told MailOnline: ‘United flight 1909 diverted to San Francisco this evening due to a potential security issue on board.
‘The flight landed safely and was met by local law enforcement. We are working to get our customers to their final destination as soon as possible.
It comes after Ryanair passengers were forced to take shelter in a barn after a bomb scare at a French airport caused travel chaos.
Families preparing to board a Ryanair flight from Bergerac to London Stansted were ushered into cold and damp agricultural buildings loaded with tractors and equipment.
It is understood the departure had already been delayed by a technical problem with the plane when the bomb scare occurred.
A Ryanair source blamed a ‘hoax security threat’ and confirmed ‘passengers were temporarily moved to a nearby facility while the airport was assessed’.