Neighbours heard a gunshot and a woman screaming that her boyfriend had been shot at a unit block where a young man was gunned down north of Brisbane.
Homicide detectives are interviewing residents in Young Street, Petrie after a 24-year-old man was shot in the chest just after midnight on Friday.
The man was rushed to hospital in a critical condition but he could not be saved.
Neighbour Blake Ward said a gunshot woke him up and when he walked outside he saw a woman crying out for help.
"... I saw the girl run through the alley that was calling for help and that was it," he told Fairfax media.
"The girl come running up screaming for help, her boyfriend just been shot."
Another neighbour Peter Schnitzerling told The Courier-Mail he heard a bang and people "freaking out about the police" before some people fled in cars.
Police believe a number of people may have witnessed the shooting.
Officers are due to update the media on the investigation at 1pm.
