BARRIE, Ont. - Police in Barrie, Ont., say an autopsy has confirmed that a man killed at a mini-putt golf course last weekend was stabbed in the neck and a golf club was involved.

Investigators say they will not be releasing specific details of the altercation that led to the death of 42-year-old Bradley Hubbard because they still need to interview some witnesses.

Three men from nearby Innisfil -- Justin Spring, 18, Matthew Spring, 19, and 18-year-old Jake Workman -- are charged with second-degree murder.

Hubbard was golfing with his girlfriend and two daughters, aged 4 and 7, on Saturday night when he was attacked.

Hubbard's son Dustin, 20, says the Collingwood, Ont., father of seven was stabbed in the neck with a broken putter after he confronted a group of rowdy teens.

The three accused remain in custody and are to appear in a Barrie court on Wednesday morning.

Police declined to say whether the golf club was used to stab Hubbard in the neck or not.