A police officer shot and killed a man during a confrontation at a train station southwest of Brisbane.
It is believed that the man was armed with a knife at the Ipswich Central train station when the police were forced to open fire around 4.15pm Sunday.
Interim superintendent Mel Adams said three policemen were confronted by a man during the "brief" meeting on the train platform.
"It's really a tragedy this Sunday afternoon," he told reporters near the scene.
"Having a deceased person is too much, this is a really traumatic time for the police and for the local community and we are going to work as hard as we can to help people overcome that."
Representative Adams did not say why the police shot the man or if he had been on the train since it was "very early" in the investigation stages.
"We are not looking for anyone else, we have established a crime scene," said a police spokesman.
Police said there were no other injuries and that rail services were suspended, and passengers were told to avoid the area.
The Ethics Standards Command is on the scene investigating and the police still have to talk to the man's family, Mr. Adams said.
The Ipswich and Rosewood train lines are suspended in both directions from Thomas Street due to the firings until the last service on Sunday.