A 49-year-old man wounded four police officers before he was arrested on Wednesday in Germany.
Two officers suffered serious gunshot wounds; one of the officers is in a critical condition.
The man apparently belongs to the far-right Reichsbuerger movement (Reich citizens). He opened fire as the police raided his property to confiscate his 31 weapons, for which his permit had been revoked.
The so-called Reich citizens for not recognize the post-WWII authority of the federal republic and continue to pledge allegiance to the German Reich (Empire).
The incident took place in the town of Georgensgmuend, south of Nuremberg, in the southern state of Bavaria.
The Bavarian interior minister, Joachim Herrman, said authorities will reassess the danger and review the extent to which Reichsbürger members own weapons. Members of this group are, according to authorities, likely to be radicalized.