Detectives are calling on a Russian construction worker who is wanted over a fatal stabbing at a St Peters building site to hand himself in.
Vladimir Kondakov hitched a lift to Rockdale on Wednesday afternoon after 76-year-old property developer Albert Metledge was killed and his 33-year-old son, Antony, was wounded in the double stabbing at St Peters.
Kondakov had been an employee of the company "for some time" and there were no previous issues, Chief Inspector Michael Merrett told reporters on Thursday.
The 49-year-old is of no fixed address but is understood to have connections to the Bankstown area.
He was already known to police, but for "unremarkable" matters, the chief inspector said.
"If you were seeing this, please make yourself known to a police station and turn yourself in," Chief Insp Merrett said in a direct appeal to Kondakov during a press conference.
The father and son were stabbed in a "violent and unprovoked" attack, he added.
Albert Metledge, who died at the scene, was described as an "accomplished and well-respected man" in a range of tributes posted on social media.
Brian Metledge said the family was shocked by what happened.
"RIP Uncle Albert," he wrote on Facebook.
"The family is in shock and unable to talk or see anyone at the moment. We thank everyone but request privacy at this moment. Please let family and friends know,"
Antony Metledge was taken to Royal Prince Alfred Hospital where he underwent surgery and his condition has improved, Chief Insp Merrett said.
Kondakov is described by police as caucasian, 180-centimetres tall with a shaved head. He was wearing a blue T-shirt and pants and work boots and speaks with a "fairly thick" Russian accent.
Police have warned the public not to approach him.
The driver who gave Kondakov a lift has been spoken to by officers but is not connected to him and was unaware of what had happened.
Australian Associated Press
Police have released an image of a man they want to talk to in relation to yesterday's stabbing murder of property developer Albert Metledge at St Peters.
Vladimir Kondakov, 49, is described as being of Caucasian appearance, about 180cm tall, with a large build and a shaved head. He speaks with a Russian accent.
Police urge the public not to approach the man, but to call Triple Zero (000) immediately.
Kondakov is believed to have hitched a ride to the Rockdale area after the double stabbing at a construction site on the Princes Highway where 76-year-old Mr Metledge was killed and his 33-year-old son Antony was critically wounded.
Mr Metledge was unable to be revived at the scene, while his son, who had a knife sticking out of his back, was taken to Royal Prince Alfred Hospital in a critical condition to undergo surgery.
The suspect is known to the two victims but a motive was yet to be established.
On Wednesday evening a large manhunt took place for the alleged attacker who quickly fled the site by hitching a ride to St George.
The last confirmed sighting of the 49-year-old was in the Rockdale area. He was last seen wearing a blue T-shirt, long blue work pants and brown work boots and may be carrying a construction helmet and a high-vis shirt.
"Do not approach the man. If you see this man, contact triple zero. We believe he is capable of a violent act," NSW Police Inspector Chad Deegenaars said, adding that the man was known to police and did not have a "fixed address".
More than 50 police were deployed in search of the man on Wednesday, including officers from all central metropolitan police area commands, the police dog unit, police air wing and public order and riot units.
Workers at the construction site downed tools on Wednesday afternoon when they heard cries for help from the basement level of the development about 1pm.
Family members and loved ones who arrived at the scene had been greeted with "the worst news anyone can hear," Insp Deegenaars said.
"It's a very traumatic incident," he said.
"It's traumatic for the family, for the co-workers and for the police and emergency services who respond.
"We've been given great assistance from the other workers here. Obviously it's upsetting for the family, but everyone is assisting."