Turks, Libanese and Kurds fighting in Duisburg (Germany)

About 50 - 80 (numbers unsure) men fought and rioted on the "Altmarkt" (engl. Old Market) in Duisburg (Germany). They used weapons such as machetes and truncheons. After 100 policemen deescalated the situation no one wanted to explain to them why they were rioting / fighting. It is probably a conflict between turks, libanese and kurds as there were smaller fihgts in the past already.

Am searching for more information at the moment.