A man has been shot and killed in the front yard of a house in Brisbane's south-west, causing disruption to morning drop-offs at an adjacent primary school and childcare centre.
Police established a crime scene after the fatal shooting at the house on Cliveden Avenue in Oxley about 3:30am.
Detective Superintendent Andrew Massingham said up to four males and one female entered the home and began assaulting a man who lived there.
Police said the man who was shot — a 38-year-old who was seated in his car nearby — saw the assault and went to confront the group.
"Inquiries to date have established that the persons have entered the front gate, committed to assaulting the resident of the house outside the front door," he said.
"On seeing that, the deceased has come across the road and has then been struck with a shotgun."
Police believe the 38-year-old was shot in the chest at very close range.
Police said the man who died, the man who was assaulted and the group of attackers all knew each other and had been engaged in a dispute for some time.
Detective Superintendent Massingham said police responded to a number of triple-0 calls about the incident and found the man in the front yard with gunshot injuries to the chest.
Police officers and paramedics immediately tried to treat the man for his injuries but he died at the scene.
Police believe multiple shots were fired in a 30- to 40-second timeframe.
"The neighbour has reported hearing two shots — I believe they were fired from near the roadway — and then there's been additional shots obviously fired from within the front yard," Detective Superintendent Massingham said.
Detective Superintendent Massingham said the group of attackers were armed with multiple firearms.
"At this stage we believe that the five were armed with at least two firearms, one being a shotgun and the other potentially a handgun," he said.
Police believe the alleged offenders have left the area, but Detective Superintendent Massingham said investigators did not know how the group left the scene and were "desperately" seeking information from the public.
"We have a number of persons with significant weaponry and it's important that we harness what information is available in the community this morning to set us on the right track," he said.
"We have a number of lines of investigation underway currently."
He said police were looking at CCTV footage of a vehicle that the attackers may have used to flee the scene.
"At this stage, I'm not discounting even a second vehicle or some offenders leaving on foot," Detective Superintendent Massingham said.
Police have set up a homicide investigation, based at the Acacia Ridge Police station.
The man who was assaulted, who has minor injuries, is now assisting police with the investigation.
Detective Superintendent Massingham said the dispute between the parties had been going on for at least a week.
He said investigators did not believe the dispute was gang related, but could not release more details.
"The nature of that dispute is still subject to investigation and I can't further elaborate on that," he said.
Neighbours 'woken by loud bang'
The crime scene forced the closure of the drop-off zone at Corinda State School on the first day of term four, with parents asked to allow extra time to get their children to school safely.
The crime scene also affected the nearby Eden Academy Corinda childcare facility.
Both the school and childcare centre remain open today, with a large police presence in the area.
Corinda State High School advised parents to allow extra time for drop off.
Bus services to the area are also affected.
In a statement, police said Cliveden Avenue would reopen to traffic at 2pm.
Neighbour Carol Armstrong told the ABC she heard the shot ring out early this morning.
"I was woken up by a loud bang, which I thought was somebody over at the school, people going through there," she said.
"A doorbell rang this morning — a police officer telling me that somebody had been shot."
Another neighbour, Regine Maroto, said she was woken up by two gunshots and rushed to the window to see what was going on.
"I only saw a guy wearing a mask and a hoodie, carrying a gun," Ms Maroto said.
She said the man was walking towards the house.
Her housemates, who were also awoken by the noise, then called the police, she said.
"I was pretty shocked because I don't know what's happening."
"I don't know what's actually going on with the neighbours and stuff, I was just I was just curious of what happened," Ms Maroto said.
A spokesperson for the Department of Education said "support will be in place if anyone requires it."
'Upsetting and shocking'
Local councillor Nicole Johnston said she had been speaking to residents about the incident.
"It's been very upsetting and shocking for residents to wake up to this morning or — as some of them were – woken up last night," Cr Johnston said.
"Most of them thought something had happened at the school."
She said every day about 3,000 children attend the area, which includes Corinda State School, Corinda State High School and the childcare centre.
"There's just no way the police would let people go back to school if they believed there was any threat to children."
She said Cliveden Avenue near Stucol Street would likely remain closed in both directions for the rest of the day.
Ms Johnson said she did not know who the victim was.
