At the core of the extremist chat group, which is said to have planned the kidnapping of Federal Health Minister Karl Lauterbach (SPD) and a coup, are five suspects.
Four men are in custody.
They are accused of preparing a serious act of violence that is dangerous to the state and of violating the Weapons and War Weapons Control Act.
The public prosecutor's office did not provide any information on the fifth person for "tactical reasons", a spokesman said on Wednesday in Koblenz.
The accused are between 41 and 55 years old.
A total of twelve German nationals are being investigated;
according to current knowledge, however, the others had nothing to do with the attack and kidnapping plans.
They would be accused of other crimes such as illegal possession of weapons or falsifying vaccination certificates.
Prosecutor General speaks of “a colorful hodgepodge of confusion”
The investigators had identified a total of around 70 people who moved in the orbit of the extremists, who called themselves “United Patriots” or “Germany Day X”, among other things.
But by no means all of them would have made themselves liable to prosecution.
Many would have joined the chat group out of sympathy or curiosity.
The Attorney General's office spoke of a "motley hodgepodge of confusion" among the accused.
The spectrum included conspirators, corona deniers, opponents of corona policy and so-called Reich citizens;
many are located on the right edge.
However, evidence of right-wing extremism was not found in all of them.
The common background is a deep-seated anti-state disenchantment with politics and the state.
The right-wing extremist is a sociological-political, but not a legal classification.
The Interior Minister of Rhineland-Palatinate, Roger Lewentz (SPD), had spoken of "right-wing terrorism".
Federal Interior Minister Nancy Faeser (SPD) spoke of a “serious terrorist threat”.
Main accused from Rhineland-Palatinate and Brandenburg
The two main suspects from Neustadt an der Weinstrasse in Rhineland-Palatinate and Falkensee near Berlin are said to have been the key planners and organizers.
Investigators also found a Kalashnikov assault rifle on the man from near Berlin.
A "real arms depot" was found at the third suspect in the Lower Bavarian district of Landshut.
The investigators assume that he wanted to take an active part in the planned anti-state actions and use or procure weapons.