Area Police
Roughly fifty vehicles have been marked with what appears to be human blood in the Germany's city of Hanau near Frankfurt, according to law enforcement.
Vehicles, exterior walls and postboxes were marked, sometimes with Nazi symbols, they stated in a official communication.
Police say they were alerted late on Wednesday, when a resident noticed that a car in the Lamboy district of Hanau had been marked with a reddish-hued liquid.
The liquid had been applied in the form of a banned symbol, they stated.
Law enforcement then discovered numerous other marked vehicles and residential walls in the adjacent neighborhood.
Nazi symbols are prohibited in Germany under laws prohibiting the public display of Nazi-era symbols.
Police say preliminary tests show the fluid was probably human blood.
"Currently there is no lead as to its origin; investigators are currently not cognizant of any physical harm in relation with the occurrence," they added.
Local authorities announced they were working "to solve the mystery" and have requested to the public for information.
A senior representative said the incident rendered him speechless and needed to be resolved promptly.
"This act affects the center of Hanau and reawakens the pain of the extremist terrorist attack half a decade ago," he posted on social media, referring to the murder of nine individuals by a shooter targeting residents of immigrant origin in five years prior.