A security incident is causing significant delays at Brisbane Airport’s international terminal.

The Courier Mail reports a passenger set off a security screen, causing a backlog of passengers now scrambling to catch their flights.

Security screening was closed for 30 minutes at the airport as federal police investigated the matter.

“The AFP is assisting Brisbane Airport security staff following a routine passenger screening matter,” a statement from the Australian Federal Police said. “Passengers at the terminal are urged to remain patient and be aware of passenger announcements.”

The incident resulted in the entire departure lounge at the international terminal at one point being cordoned off, with security searching through plant boxes, bins and under furniture.

All planes yet to take off were instructed to disembark so passengers could be re-screened. One passenger described the scene on Twitter as “chaos” with “queues and queues of people everywhere.”

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Passengers are being warned to expect residual delays, but airport staff are “working hard to get operations back on track”.

Keep an eye on Brisbane Airport’s Twitter account for rolling updates. Flight statuses can be found here.