Emergency services were called an address on Dialba Street just before 4:00pm following reports of a gunshot. They found the man inside with a shotgun wound to his abdomen.
He was taken to the Princess Alexandra Hospital in a critical condition where he died.
The attacker had not yet been arrested, Detective Inspector Owen Elloy told reporters, adding that a major investigation was underway.
“There’s no-one in custody at this stage, we do have witnesses assisting us with our inquiries,” he said.
A crime scene has been declared as police continue to investigate the incident.