Neo-Nazi leader Thomas Sewell has been arrested and is being questioned over his alleged involvement in an attack on a First Nations protest camp in Melbourne on Sunday.

Police were seen handcuffing Sewell outside the Melbourne Magistrates’ Court on Tuesday afternoon and putting him into a police van, along with two other men.

He had earlier appeared in court charged with offences related to intimidating a police officer and breaching an intervention order in 2024.

A man with blonde hair is held down on a footpath by several police officers.

Two other men were also arrested outside the magistrates court. (Channel 9)

On Sunday, about 40 men dressed in black, some armed with flagpoles and sticks violently attacked Camp Sovereignty following the anti-immigration March for Australia rally.

Vision from the attack shows Sewell was part of the group.

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Camp Sovereignty founder Krautungalung elder Robbie Thorpe told the ABC that four people were injured, including two who spent the night in hospital.

Police have released a statement saying detectives from the Melbourne Crime Investigation Unit attended the court on Tuesday about 3:20pm.

The statement said police arrested a 32-year-old man from Balwyn, a 23-year-old man from Mooroolbark and a 20-year-old man from Ardeer.

“They are being interviewed in relation to an ongoing investigation into alleged assaults in Kings Domain,” a Victoria Police spokesperson said.

Arrest follows Sewell gate-crashing press conference

On Tuesday morning, Sewell and an associate gate-crashed a press conference with the Victorian Premier Jacinta Allan.

He shouted insults and accusations at Ms Allan, who quickly left the area while a security detail blocked the men.

Police earlier said they were aware of the incident, noting the premier’s security team had intervened.

A bald man with a brown moustache is confronted by several men in a playground.

Thomas Sewell was intercepted after gatecrashing Premier Jacinta Allan’s press conference earlier in the morning. (AAP: Callum Godde)

In a video posted to X (formerly Twitter), Ms Allan said she “never expected to come face-to-face with a Neo-Nazi … at a press conference”.

“I’ll continue to fight for every single Victorian and push back against this odious, evil behaviour of such a small number of people,” she said.

“I know that’s not who Victorians truly are.” 

During a caucus meeting in Canberra later that morning, Prime Minister Anthony Albanese told his colleagues it was “quite horrific” to hear about Sewell’s actions at the press conference.

Victorian-based federal MP Josh Burns has told the ABC’s Afternoon Briefing that while he could not comment specifically on Sewell’s arrest, he said seeing Neo-Nazis on the steps of parliament was unacceptable.

“Seeing Neo-Nazis cowardly walk around our streets in masks and in uniform, in black-cladded clothes, cowardly hiding their own identities is completely unacceptable,” Mr Burns said.

“Having Neo-Nazis turn up to the press conference of the premier and elected officials is completely unacceptable.”

He said he was proud of Australia’s diversity and multiculturalism.

“The dark and bigoted views that are being displayed by this small group of cowardly bigots frankly does not represent Australia,” Mr Burns said.

Victorian senator Lidia Thorpe described the attack on Camp Sovereignty as outrageous.

She said authorities were aware of the threat Melbourne’s Neo-Nazi group posed to the camp.

“So I just, I have a lot of questions,” Ms Thorpe said.