Three members of the same family have been killed in what police have described as a "horrendous" and "very bloody" scene at a home in south-western Sydney.

Emergency services were dispatched to a property on Juliet Close in Rosemeadow shortly after 1.30am on Sunday, following reports of a violent incident.

Officers discovered a couple in their 60s and two of their sons who had been attacked at the address.

Campbelltown Commander Superintendent Grant Healey said: "Police first encountered a 65-year-old woman and started doing first aid on her... police went inside the house and found a 64-year-old male who was still alive with serious blunt force head injuries,

"They found a male deceased in a granny flat at the rear of the premise."

"Police were confronted with a very bloody scene. Blunt force trauma is always horrendous for people to confront, and any edged weapon attack is horrendous to confront."

The man found in the granny flat is believed to be the couple's 25 year old son.

A second son, aged 30, is understood to have contacted the emergency services after being assaulted. He was transferred to Liverpool Hospital for treatment before being discharged later that morning.

Approximately an hour after the initial emergency call, police arrested a 32 year old man.

When pressed on whether charges were forthcoming, Superintendent Healey said: "It's still very early. We have a few things to run through.

Source: Daily Express :: World Feed