The alleged author of threatening letters under the code "NSU 2.0" has been arrested.
The public prosecutor's office in Frankfurt and the Hessian State Criminal Police Office announced this late on Monday evening.
The 53-year-old is under urgent suspicion of having sent letters nationwide with inciting, insulting and threatening content since August 2018.
The recipients included the Frankfurt lawyer Seda Başay-Yıldız, the cabaret artist Idil Baydar and today's Left Party leader Janine Wissler.
Members of the Bundestag and journalists were also among those affected.
According to the investigators, the person arrested in Berlin on Monday is an unemployed German who has already been convicted of right-wing crimes in the past.
"Complicated and time-consuming" measures would have led to his identification.
It is unclear how the suspect got the partly personal data that he used in the threatening letters.
So far, the investigators had assumed that some of the information came from police computers.
In the notification from the public prosecutor's office and the LKA, it only states that the man who has now been arrested was "at no time an employee of a Hessian or other police authority."
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