The best friend of a man who was clubbed to death inside his Badgerys Creek home says he cannot comprehend why anyone would want to hurt his friend, whom he described as a "genuine, hard-working man".
Keith Cini, aged in his late 60s, and his partner Lucy, also in her 60s, were attacked by three men who smashed their way into their Badgerys Creek home and assaulted them with what police have described as club-like weapons in the early hours of Friday.
Man killed in Sydney home invasion
An early morning 000 call sparked a homicide investigation when police found the body of a man and his injured wife at their Badgerys Creek home in Sydney's west on Friday. Nine News.
Mr Cini, who is the director of his own trucking company, Keith Cini Pty Ltd, suffered severe head injuries and died in the single-storey brick home on Elizabeth Drive where he had lived for nearly 30 years.
His partner also suffered head injuries in the attack, but managed to phone triple-0 at 4am to raise the alarm.
She told emergency services she and her partner had been attacked, and that her partner was unconscious and not breathing.
Police and paramedics arrived at the home a short time later but were unable to revive Mr Cini. His partner was bleeding heavily from the head and was believed to have suffered a broken arm. She was taken to Liverpool Hospital for treatment.
Charlie Zahra said he was Mr Cini's best friend, and was struggling to comprehend what had occurred.
"It's a very, very big shock. He was my best friend for 25 years. He was just a genuine, hard-working man," Mr Zahra said.
"He was a man of his word. I mean, if I would tell him 'Listen Keith, I need some help, I just need to pay some money', he would say 'No problem'. He wouldn't even ask me what it was for.
"He was a very genuine person. I can't find a more genuine person than him. He would help anyone."
As well as owning a trucking company, Mr Cini and his partner operated a piggery on their semi-rural property, which is located on Elizabeth Drive near the intersection with Lawson Road.
Mr Zahra said his friend worked very hard at his businesses.
"He used to carry on his trucks everything from bitumen, and wheat, and had some contract to carry pipes," he said.
"It's very, very bad."
Mr Zahra said he had no idea why anyone would want to target Mr Cini.
"I don't know. People could be jealous of him, you know. All I know is he would never do anything with the crooks. He would never," Mr Zahra said.
Detective Inspector Hans Rupp, from the Homicide Squad, said the investigation was in its early stages and police were still searching for a motive.
Earlier on Friday, police said they were investigating whether the couple were attacked in a robbery gone wrong.
"We're taking a statement from the woman in the hospital as we speak now," Detective Inspector Rupp said.
"It was a brutal attack, and clearly the man was very badly assaulted and the woman was also assaulted but she's not in a serious condition."
He said it was unclear how the three men got to the property or fled the house, but detectives were examining CCTV from nearby service stations to try to identify the offenders.
He said the offenders smashed their way into the house before attacking the pair.
"I think [the man] was assaulted with some sort of club," Detective Inspector Rupp said.
Homicide Squad detectives have set up an extensive crime scene and are examining the house.
The road was initially closed but has been reopened.
The NSW Police spokeswoman was unable to confirm reports that baseball bats were among the weapons used in the attack.
Anyone with information has been urged to call Crime Stoppers on 1800 333 000 or visit the Crime Stoppers online reporting page.