An elderly man suffered a heart attack when he was tied up and bashed by gun thieves in his Blue Mountains home, west of Sydney.
The man's wife came home around 8:00pm (AEDT) yesterday to find the 77-year-old tied up in their garage at Wentworth Falls.
The man was working in the garage of his Maple Grove home when he was bashed by intruders two hours earlier.
Detectives believe he was hit over the head with glass bottles that were found smashed on the ground, before the intruders stole nine registered guns and rifles from a safe.
The man was taken to Nepean hospital with head injuries last night.
A crime scene has been established and police in the Blue Mountains are appealing for anyone who may know more about the attack and robbery to contact them.
Police are also hoping to speak to the man so that they can get a description of the intruders.
The attack came hours after New South Wales Police announced Operation Apollo, which is aimed at reducing the number of shootings across Sydney.
It also came just a day after the death of another elderly Sydney man who was injured in a struggle with an intruder.