A passenger has set off a security screen at Brisbane Airport's international terminal, forcing travellers to be re-screened and delaying flights.
A spokeswoman for the airport said security screens were closed for 30 minutes as a result of the breach on Friday, leading to a backlog.
She said Australian Federal Police officers were investigating the matter, but an AFP spokesman said the agency was not involved.
Some passengers were re-screened and a number of international flights delayed, the airport said in a tweet.
