Flights have been delayed and diverted at Sydney Airport after an air traffic control tower was evacuated.

An Air Services Australia spokesperson told 9News the incident was sparked due to a gas leak.

READ MORE: Reptile catcher issues warning after father dies from suspected snake bite

Fumes are believed to have spread through the air conditioning.

Along with delays, one international flight has been diverted.

The United Airlines craft was sent to Brisbane.

More to come…

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