Last week 's wild shooting on the street in Duisburg, in which four people were injured, was caused by a conflict within the local Hells Angels, German media reported . Immediately after the shooting, police arrested 15 people.

There was a gathering that evening of members of the Hells Angels and of a group of people of Lebanese descent. Focus writes that a Lebanese member of the Hells Angels was angry about his expulsion from the club. He had demanded a meeting with the president of the Duisburg chapter. That meeting escalated after a few minutes. Several people opened fire at one point.

The man is said to have been kicked out of the club because he allegedly gave information to the detectives about a 'brother' and also mentioned some Hells Angels members by name. That is a violation of the Hells Angels code. According to Focus, the Angels president had brought parts of the police investigation file to the meeting as evidence.

It is not yet clear who has been arrested. Police suspect the suspects of attempted murder.

The injured are not in life-threatening condition.