Sydney Airport air control tower is being evacuated due to a fire, and the ABC understands all flights are being diverted.
Emergency services were called around 11.40am to the air traffic control centre.
Fire and Rescue NSW said 20 people needed to be evacuated from the building.
One man, on a flight bound for Bali, told the ABC the pilot had told passengers “he had not heard from the control tower” and that no planes were taking off or landing.
More to come.