Germany's self-proclaimed "king" and three of his senior subjects were arrested, and their groups were banned for attempting to overthrow the country.

Peter Fitzek, 59, was among those arrested in a early morning raid in seven states on Tuesday, involving about 800 security personnel.

The government prohibited their groups, the Empire or the "citizens" of the Empire, aiming to establish Königreich Deutschland or the "kingdom of Germany".

German Interior Minister Alexander Dobrindt accused the group of attempts to "undermine the rule of law" by creating another country and spreading "anti-Semitic conspiracy narratives" in support of their so-called authoritative claims."

His ministry announced the dissolution of the organization and charged it with financing through the "economic crime structure."

Former chef and karate coach Fitzek called himself the "king" and identified himself as the "Peter First" in the previous court case.

He was crowned in 2012 while wearing an Ermine robe and wielding a medieval sword. He has been buying land and property in Germany since then.

Reichsbürgers owns its own currency, logo and ID card and wants to establish a separate banking and health system.

Fitzek claims to have thousands of followers or “themes”.

In an interview with the BBC in 2022, he denied any violent intentions, but also described the German state as "destructive and patient".

When she visited his "kingdom" in eastern Germany, he told BBC's Jenny Hill that he told BBC's Jenny Hill: "I have no interest in being part of this fascist and Satanic system."

Fitzek has clashed with authorities several times and refused to comply with German law, usually in a way that seeks publicity.

After deciding to give his symbolic rejection, he was previously sentenced to jail for driving repeatedly without a license. At the end of a trial, Fitzker was found driving in front of the court and driving.

Fitzek is one of about 25,000 Reichsbürgers in Germany. The number has been growing over the past few years.

Many are right-wing extremists who peddled racist and anti-Semitism conspiracy theories. They refused to recognize the authority of the security forces, and many possessed illegal weapons, which led to gunfights with police. About 2,500 people may be violent, with 1,350 classified as right-wing extremists, officials said.

In 2022, dozens of people were arrested, many of whom were planning to overthrow the German government in Berlin. They are accused of planning a violent coup that includes kidnapping of the health minister to create “civil war conditions” to lower German democracy.

In the past, Reichsbürger was often regarded as a quirky crank for his peculiar ideas.

But as Germany's political power grew over the past decade, officials now see it as a serious threat.

Karlsruhe's federal prosecutor's office said Fitzek was arrested along with three other suspected team leaders and classified him as a criminal organization.

As the “so-called supreme sovereignty”, Fitzker has “control and decision-making power” in all key areas.

It added in a statement: "The Kingdom of Germany considers itself a sovereign state in the sense of international law and strives to extend the 'state territory' it claims to be to the borders of the German Empire in 1871."