Man, 90, dies after fight between relatives turns nasty

An elderly Queensland man has died and another is under investigation after an argument between relatives turned nasty.

The 90-year-old Brisbane man died in hospital after fighting with a 70-year-old man at their home south of Brisbane, police said.

A report is being prepared for the coroner and the man is assisting detectives, however, police say it's not a homicide investigation.