British Airways has cancelled three planned flights from London to cities in the United States for security reasons.
A number of flights from Paris to the United States have also been cancelled.
The move coincides with an unconfirmed report that the United States has intelligence that the al Qaeda terrorist network may be targeting such flights.
British Airways, following security advice from the British government, said it had cancelled three planned flights from London to cities in the United States.
The cancelled flights are two from Heathrow to Washington, due to depart tomorrow and on Monday, and one to Miami, tomorrow.
The Heathrow-Washington flight was cancelled several times a month ago after the US raised its terror alert to high over the Christmas period.
And Air France is cancelling two flights from Paris to Washington, tomorrow and on Monday, also for security reasons.
