The attackers threw three Molotov cocktails at the club building, damaging the façade and destroying a glass door, according to the authorities in the North Rhine-Westphalian city. No-one was injured in the attack.
The public prosecutor's office believes the perpetrators are likely from the “Kurdish scene,” and said finding a connection between the two attacks could “not be ruled out.”
On Saturday night another attack with several Molotov cocktails on the Turkish consulate in the city slightly damaged the building's façade. Here investigators also found clues that led them to assume the attackers were also of Kurdish background.
Suspects also threw Molotov cocktails at a nearby school, and petrol-soaked tires were found at the scene.
Some Kurds in Turkey are involved in a long-running separatist movement, and their treatment by the Turkish government has been frequently criticised by human rights groups.