The latest victim was wearing a kippah as an experiment to see how safe Jews were in Germany.
Police in Berlin are investigating an assault on two young men in which the attacker was heard shouting anti-Jewish abuse.
One of the victims was wearing a Jewish skullcap at the time of the attack.
It is reported the alleged attacker has turned himself in to the authorities.
Al Jazeera’s Dominic Cane reports from Berlin on how this incident is part of a trend of increasing anti-Jewish activity in the German capital.