A 32-year-old man injured another man with a razor in a hairdressing salon in Berlin-Neukölln.
According to current knowledge, the two men should have got into an argument in the shop on Karl-Marx-Platz on Wednesday evening, as the police announced on Thursday.
The 32-year-old then attacked the 22-year-old with a razor on the back.
Berlin - According to the police, it is so far unclear whether the men knew each other before and why the dispute came about.
The 22-year-old came to a hospital, he was treated on an outpatient basis.
The police took the suspect into custody in the evening and released him after the data had been established.
Both men are known to the police for violating the Narcotics Act.
dpa