The police are investigating several anti-Semitic graffiti that have been posted at various locations in the Bockenheim district of Frankfurt.
As a spokesman said on Wednesday, these are so-called tags that were written with black Edding on signs at stops, for example.
Among other things, it says "FCK JDN" and "JDN TTN".
In some places the first day was titled "FCK NZS".
According to the spokesman, the first graffiti of this kind were reported a few weeks ago.
State security is also involved in the investigation, "the responsible authorities are investigating the matter".
Witnesses who can provide information about the authors of these tags are asked to contact the police.