Swedish police find drugs on Justin Bieber bus The officers had been posted outside the 19-year-old's hotel to control a frenzied crowd of his fans, known as 'Beliebers', who had gathered to catch a glimpse of the Canadian singer. A police officer on crowd duty smelled marijuana on the empty tour bus outside the hotel where Bieber was staying just before his concert in the capital on Wednesday night, police spokesman Kjell Lindgren told Reuters. "The police went onto the bus and searched it and found a small amount of narcotics," Lindgren said. We don't know who had the drugs or who smoked them, so it will be hard to link them with any individual. Lars Byström from Stockholm police told The Daily Telegraph: "When they opened the door, one of our officers said it smelled like someone had been smoking marijuana." The drugs have been sent for analysis and Mr Lindgren said the police did not plan further action unless they got more information. Bieber is travelling Europe on his "Believe" tour and is due in Finland for a concert on Friday. The singer has had a string of recent controversies. He was heavily criticised earlier this month for writing a self-promoting message in the guest book of the Anne Frank House, declaring his hope that the holocaust victim "would have been a belieber." Last month his neighbour in Los Angeles accused him of attacking and threatening him and he has more than once been accused of violently lunging at photographers. Last summer he received a speeding ticket in Los Angeles as he tried to escape a crowd of journalists. He collapsed backstage during a recent London concert and cancelled a performance in Portugal. The singer has already moved on to Helsinki, Finland, for the next date in the tour.