Dusseldorf (dpa) - With a large-scale raid the police in the Ruhr against Clan crime. 1300 police officers have been on duty since the evening. The North Rhine-Westphalian Interior Ministry speaks of the largest raid of this kind in the history of North Rhine-Westphalia. In Dortmund, Essen, Duisburg, Recklinghausen and Gelsenkirchen, officials are searching for hookah bars, betting shops, cafés and tearooms. It is about the suspicion of money laundering, tax evasion and moonlighting. There was an arrest in Essen.