An Australian Border Force security outage at Sydney's Kingsford Smith Airport has been resolved after international passengers experienced delays.
A security outage that caused passenger delays at Sydney Airport has been fixed.
The outage affected passport control for international passengers at the airport from about 9.30 on Monday morning, according to media reports.
Australian Border Force could not confirm what the issue was or how many airports were affected, a spokeswoman told AAP on Monday.
The issue was resolved just before 11.30am, the ABF said on Twitter.
"Our staff are working hard to minimise earlier delays caused by an outage. We appreciate the patience of passengers at this time and apologise for any inconvenience this may have caused," the ABF said.
Irate flyers took to social media to voice their annoyance.
"This is absolutely crazy! I’ve never seen a line like this in my life!" one person tweeted.
Travelers were advised to allow extra time at the airport because of the delays.
It comes after dozens of flights were cancelled due to strong and damaging winds battering Sydney and southern NSW.
Wind speeds approached 50km/h, while gusts topped 70km/h on Saturday morning at Sydney airport.
Qantas, Jetstar, Tigerair, Rex and Virgin all cancelled multiple flights into and out of the airport in the city's south.