In a statement Qantas said a person "inadvertently entered the terminal without a security screening" forcing some passengers off planes and into lengthy queues.
"As a precaution all Qantas operations have been put on hold and passengers in the terminal are being re-screened, which is causing delays to some services this morning."
- Qantas
Almost a dozen flights have been delayed, while one Gold Coast flight was cancelled.
Flow-on effects are expected to occur in airports across the nation throughout the morning.
Travellers took to social media to vent their frustrations with their plans now up in the air!
A similar similar incident occurred last month at Sydney airport when a passenger bypassed security screening.
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