Witnesses are telling of the horror and fear they endured after Canberra Airport was evacuated due to a random shooting.
Five gunshots were fired outside the security checkpoint in the main terminal building about 1.30pm.
ACT Police Acting Superintendent Dave Craft told media one man had been arrested.
Footage posted to social media shows a man being handcuffed and detained by officers, who have since recovered a firearm.
Mr Croft said the airport remained an active crime scene, and police were working to secure the area to allow the hundreds of passengers waiting for their flights into the building.
Police have “no idea” of any motivation of the shooter, but it appeared as thought he had been acting alone.
“There is no ongoing threat to the community,” he said.
“At this stage, it’s our understanding that the male arrived at the airport and had not gone through any flight screening process.”
Police say the man had not been firing at people, with no shots directed to people, passengers or staff.
One man was inside waiting for his son when he heard the bullets ring out above him.
“I saw the glass falling down and I thought maybe the glass had exploded,” he told NCA Newswire
“Everyone ran for their lives.
“I didn’t think it was a bullet at first. Then I heard everyone running and I ran.”
Other witnesses reported being yelled at to “get down, get down”.
One woman who asked not to be named told NCA Newswire she saw the man, who she described as middle age and “clean cut”, fire a pistol half a dozen times.
The airport was quickly evacuated with hundreds of people standing outside the building.
“CCTV has been reviewed and at this time the person in custody is believed to be the only person responsible for this incident,” ACT Policing said in a statement.
More than a dozen police vehicles were stationed outside the airport while armed offices guarded the outside of the building.
There are no reported injuries.
By 4pm, Prime Minister Anthony Albanese said he had been briefed by the AFP on the “incident”.
“I am advised a man has been detained and there is no ongoing threat present,” Mr Albanese wrote on Twitter.
Senator Katy Gallagher took to Twitter to say she was “shocked” by the news.
“Our local airport is such an important part of Canberra community and it must have been terrifying for everyone @CanberraAirport this afternoon,” she wrote.
Unconfirmed reports suggest a man with a revolver shot rounds into the airport windows near the Qantas desk.
It is understood he had not passed through the security checkpoint.
Images posted to social media show bullet holes and smashed glass panels where the gunman allegedly aimed the shots.
Witnesses say the AFP were conducting a security sweep while the airport is evacuated.
A Canberra airport spokesperson declined to comment, saying it was a police matter.
No planes are understood to have been diverted, but none have left the airport since the shooting.
Flights that arrived around the time of the shooting have been taxied on the tarmac, but began to disembark about 3.30pm.
Police are asking members of the public not to attend the airport in the coming hours, but flights are expected to resume this afternoon.
Police are expected to charge the man later today.