A woman has been found with her throat cut in an apartment building metres away from where a man went on an afternoon stabbing rampage in Sydney's CBD.
Mert Ney, 21, terrorised Sydney CBD by running around with a large kitchen knife and stabbed a woman before members of the public restrained him on the ground with chairs and a milk crate.
Police said Ney attempted to stab "multiple people" and was arrested minutes after he allegedly plunged a knife into a woman's back at a city hotel.
Police have confirmed a woman was found dead in the apartment block Clarence House just after 3pm this afternoon.
The Daily Telegraph reports the woman was found with her throat cut.
Police confirmed the apartment death is linked to the knifeman's stabbing rampage.
Ney, 21, was acting alone, police said, and this afternoon's stabbing is "not currently classed as a terror incident".
NSW Police Commissioner Mick Fuller on Tuesday evening said Ney "is by definition a lone actor".
"Information was found on him that would suggest he had some ideologies related to terrorism... but he has no apparent links to other terrorist organisations," Fuller said.
Fuller suggested a USB drive contained content related to other mass killings in New Zealand and the US, Sydney Morning Herald reported.
Ney is an escaped mental patient, according to The Daily Telegraph.
Clarence St Cyclery, the shop that sits directly below the apartments where the woman was found dead, was forced to close this afternoon after police set up crime scenes in front and behind the shop.
An employee from the shop told news.com.au he saw the armed man run past.
"There's something going on upstairs," he said.
"They've had a whole lot of top brass police go up there."
NSW Police confirmed one victim, a young woman, was stabbed in a hotel near Clarence St and King St in the central city. She has been taken to hospital in a stable condition.
Video of the incident showed members of the public and a firefighter restraining Ney on the ground with cafe chairs and a milk crate.
Ney has blood on his hands and shirt. He had earlier been yelling "Shoot me, I want to die."
NSW Police Superintendent Gavin Wood said the alleged offender had tried to stab multiple other people.
"Those attempts thankfully were unsuccessful," Wood said.
Wood praised the bravery of bystanders who helped apprehend Ney.
"They were significantly brave people. To approach a person with a mind set of obviously what this person [had], with clear evidence of a stabbing previously, these people are heroes."
There is a heavy police presence on King St and Clarence St in Wynyard.
Adrian Papaianni was leaving his office on Clarence Street when he heard people screaming.
"There were a stack of people running down Barrack Place saying that there was a guy with a knife," Papaianni told news.com.au.
"I ran into the Woolworths and people inside got them to shut the glass doors. I was feeling OK until I saw a mother crying with her baby in her hands, trying to get into the Woolies.
"Police started arriving about a minute later and started to chase him."
An Uber driver who was on King Street near the Grace Hotel told 2GB Radio that he saw the terrifying incident unfold.
"Next thing I see this guy jumping over the car, over the bonnet … he had a knife in his hand," the man said.
"He had a bit of blood on his shirt.
"There were police, people with their phone out, there were fireys trying to contain him."
More to come.