Germany's government has banned the largest “Reich citizen” group. The extremist far-right organization calls itself the “Kingdom of Germany” and seeks to undermine the country’s democratic order.

Police arrested four members of a radical group seeking to replace the modern German state, the interior minister and prosecutors said on Tuesday, in the latest operation against a far-right movement flagged as a potential threat to democracy.

German Interior Minister Alexander Dobrindt has banned a major faction of the far-right "Reichsbürger" movement. Some leaders of the group, the "Kingdom of Germany," have been arrested, including its self-declared king.