Singer Justin Bieber was attacked in a club here by an unknown man.
The incident took place on Friday night, reports tmz.com.
The 22-year-old was leaving Heart nightclub in the German city when a man aggressively shoved him, but Bieber was quickly removed from the area by a woman in a German Beer Wench outfit.
"The man was trying, but failing, to get Justin's attention all night and once they came face-to-face he decided to lunge at the singer," said a source from the nightclub.
In a video of the incident, Bieber's business partner John Shahidi can be seen shoving the attacker to the ground.