In search of a suspected weapon, the police in Bremen searched the apartment of a 55-year-old who is said to be close to the right-wing extremist Reich citizen scene.
Because there were several arrest warrants against him, the man was taken to a prison, the police said on Wednesday.
Bremen - The trigger for the operation was an audition by the man in the public order office, where he wanted to complain about a fine.
There he behaved aggressively and indicated that he was in possession of a weapon of war.
When the apartment was searched last Friday, several knives and non-functional ammunition were found.
The police state security responsible for political crime continues to investigate, it said.
dpa