Grim new details have emerged around the deaths of three people in a home in Sydney's south west overnight as a man remains in custody.
Police found the bodies of a couple in their 60s and their 37-year-old son at the home on Juliet Close, Rosemeadow just after 1.30am on Sunday.
Emergency services were called to the home following reports of a violent assault however were confronted by a 'very grisly crime scene' upon their arrival.
'Police first encountered a 61-year-old woman and started doing first aid on her... police went inside the house and found a 64yo male who was still alive with serious blunt force head injuries,' Campbelltown Commander Superintendent Grant Healey told reporters on Sunday morning.
'They found a 37-year-old male deceased in a granny flat in rear of the premise.'
Superintendent Healey said another brother aged 30 was taken to Liverpool Hospital and was released after receiving medical treatment.
Officers arrested a 32-year-old man an hour after the grisly discovery after a silver sedan pulled up at the scene.
He was taken to Campbelltown Police Station where inquiries are continuing.
More to come.
Police found the bodies of a couple in their 60s and their 37-year-old son at the home on Juliet Close, Rosemeadow just after 1.30am on Sunday
Police removed a silver Subaru sedan from the street, which seemingly had blood on one of the handles