Sydney stabbing: Suspect carrying USB with Christchurch massacre details

The man arrested after a stabbing spree in central Sydney was carrying a USB containing details about the Christchurch massacre.

Mert Ney, 21, allegedly stabbed two women on Tuesday (local time), one fatally. It's believed he tried to stab several other people as he ran around King and Clarence Streets, near Wynyard Station.

He was detained by witnesses who pinned him down under chairs and crates on the street until police could arrive. He's been linked to the death of a 21-year-old woman and is expected to be charged with homicide. A 41-year-old woman was hospitalised with non-life threatening injuries after being stabbed in the back during the rampage.

Ney, who is known to New South Wales mental health services, can be heard yelling "Allahu Akbar" while brandishing a large knife in videos taken at the scene. 

NSW police commissioner Mick Fuller told media the suspect is a lone actor who seems to have been influenced by recent terror attacks in other countries, evidence of which was contained in documents on a USB drive found on his person.

"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," he said.

"There was certainly information found on him about other crimes of mass casualties and mass deaths around the world. Some of them around North America, and some are more recently around New Zealand."

The suspect was restrained by witnesses.
The suspect was restrained by witnesses. Photo credit: 7News

It's understood Fuller was referring to the March 15 mosque attack, as well as the recent back-to-back mass shootings in El Paso, Texas and Dayton, Ohio.

The suspect in the El Paso shooting is believed to have posted a manifesto online before the attack in which he also expressed admiration for the alleged Christchurch gunman.