ACT police have confirmed they are now investigating the material.

The leaflets laden with anti-semitic, racist text, described diversity as "white genocide" and directed readers to a website for the supposed group, 'Hussaric Dawn'.

But the mother of the man who authored the leaflets said her son had autism and was "easily led".

The group's website named Sean Parker – a pseudonym – as the founder. Mr Parker is a prolific sci-fi/fantasy author.

It was not clear to his mother why her author son had been inspired to write the materials.

On Friday, ACT police confirmed the leaflets had been referred to them.

A spokesperson said they were still "assessing the material" .

"All circumstances will form part of the assessment," the spokesperson said.

The leaflets had caused alarm to Tuggeranong residents, with pictures of the material circulating Canberra social media pages since Wednesday.

The website promoted a eugenics program and the foundation of a white-ethno state in Australia's south-east.

On Saturday the website was still live but was limited to only a blank, white page after the family attempted to take it down. Before Saturday, the site had laid out policies and plans.

The website named Mr Parker as the founder of 'Hussaric Dawn' and promoted his sci-fi / fantasy novels.

Tuggeranong resident Julia Brown said she was horrified such materials were circulating in Canberra.

"It spews all this hatred about Jews and people of different colour, religion," Ms Brown said.

"If someone had found him putting it in their letterbox they could have gotten quite nasty."

Ms Brown said her neighbourhood was diverse and she was worried those from non-white backgrounds would be made to feel unwelcome.

Residents had handed the material to Canberra Labor MP Gai Brodtmann who was glad the Tuggeranong community had strongly rejected their content.

"I'm proud that Tuggeranong residents, like me, have zero tolerance for racism, religious vilification and hate speech," she said.