The man killed by a gunshot during filming of a music video in Brisbane was 28-year-old actor Johann Ofner.
Mr Ofner was working on filming for Australian hip-hop group Bliss n Eso at a bar in Brisbane's CBD when he was shot in the chest about 2pm on Monday (local time).
It is not yet clear if live ammunition was deliberately being used or not.
"During the filming of that scene, several firearms were used," Queensland Police Detective Inspector Tom Armitt told local media.
"I can't tell you whether they're live or real firearms, I can't tell you the type of ammunition that were being used.
"At this point in time, Queensland Police are conducting a criminal investigation."
Blanks are still dangerous, weapons specialist John Bowring said.
"It is a requirement by law that if you have firearms, even imitation, having a licenced armourer [is also required] under film safety code, which falls under health and safety act," he told the ABC.
Sources say Mr Ofner was shot with a blank round at close range, causing two chest wounds, the ABC reports.
Mr Ofner worked as a stunt action performer and had recently been on Australian Ninja Warrior.
Members of Bliss n Eso released a statement on Facebook on Monday, expressing their grief over the incident.
"We were not on set at the time and our management team are currently working with the police and the production company filming the video to get more details," they said.
"The three of us are extremely upset and shaken up by this and our hearts and prayers go out to the victim's family and friends as well as the cast and crew who were involved in the clip."
The music video's plot is reported to have involved businessmen, taxi drivers and drug dealers.
"There have been no instances of fatalities to our knowledge in the recent past, and that is because we have very rigorous standards in relation to safety," Australia's Media, Entertainment and Arts Alliance (MEAA) national director of equity Zoe Angus said.