A 75 year-old Margaret River man has died in hospital after a physical altercation took place with a 67 year-old man on Holbrook Street at 3.45pm on Tuesday.
It is alleged the men were known to each other and the homicide squad detectives are travelling to Margaret River to conduct inquiries.
On Tuesday, the man was conveyed to the Margaret River Hospital before being flown by the Royal Flying Doctor Service to Royal Perth Hospital.
Busselton Detectives charged the 67 year old man from Margaret River with grievous bodily harm and aggravated assault occasioning bodily harm.
He was due to appear before the Bunbury Magistrates Court this morning, January 31.
Charges may be upgraded pending the results of these inquiries.