A man is said to have hit a 40-year-old in the face with a glass bottle in Berlin-Friedrichshain and injured him.
The attacked was early Saturday morning with his 31-year-old girlfriend in a photo booth on the Warschauer Brücke, the police said.
Suddenly, the 30-year-old is said to have pushed the curtain aside and attacked the man with the glass bottle.
Berlin - When he left the machine, the attacker is said to have continued to threaten him with the broken bottle.
The victim was taken to hospital with minor facial injuries.
The alarmed police arrested the alleged attacker nearby.
The reasons for the attack were initially unclear.
The couple said they did not know the alleged perpetrator.
dpa