Police say three people have been killed and two officers injured in a siege involving a lone gunman in the southern city of Adelaide.
They say a teenager was also seriously injured in the incident that began early on Friday at a house in the suburb of Hectorville.
A police statement says the gunman remains holed up inside a house in the suburb.
One of two officers who responded to an emergency call was shot in the face when the gunman opened fire. The other injured officer received a minor knee injury.
Police say they found the bodies of two men and a woman at the scene.
Police are trying to negotiate with the gunman.