Loading

I'm wrapping up our live blog for tonight, but Herald crime reporter Lucy Cormack has collated the most recent developments from today's attack.

She writes that while Mert Ney's screams suggested a possible allegiance to Islamic extremist ideology, police have since seized a phone and USB stick containing information about recent mass deaths and violent acts of white supremacy in the US and New Zealand.

Police said the 21-year-old, who shouted "Allahu Akbar" while wielding a knife in Sydney's CBD, was most likely a troubled man with a long history of mental health issues and no known links to any terror organisations.

It is understood police spoke to Mr Ney's mother at her home in Sydney's west about 3pm today. Police have said the overwhelming amount of news and citizen footage of the incident would be helpful, but it would be Mr Ney’s background over the past year that investigators will look at most closely.

Mr Ney was taken to Royal Prince Alfred Hospital with minor injuries. He is expected to face charges after being formally questioned by police.