Police have arrested 13 people including a patched Hells Angels member they claim are behind a P and cocaine drug ring. The police operation ended on Wednesday with the arrest of seven men, and a single seizure of 750 grams of cocaine and $81,000 in cash. The investigation had been running in Auckland for several months. Street value of the total drugs seized was about $300,000, police said. They said two of the people they arrested Wednesday were arrested for the second time in a month. Detective Senior Sergeant Lloyd Schmid said the cocaine seized was a ‘‘significant find’’.