Breaking news on BBC
British Airways has suspended all flights to Saudi Arabia until further notice in response to a specific terrorist threat to its planes in the country.
The threat became apparent in the last 24 hours but is not thought to be related to the missile arrests in the US, said BBC security correspondent Frank Gardner.
The decision - announced by the company on Wednesday - follows discussions between the airline and the Department of Transport.
The airline's director of safety and security, Geoff Want, said: "As a matter of precaution we have decided to suspend all flights to Saudi Arabia for the time being and we will continue to liaise closely with the British Government."
All flights from London Heathrow to both Riyadh and Jeddah were cancelled on Wednesday.