Swedish police have found drugs on the tour bus of singer Justin Bieber after officers detected "a strong smell of marijuana" coming from the vehicle.
The officers had been posted outside the 19-year-old's hotel to control a frenzied crowd of his fans, known as 'Beliebers'.
A police officer 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.
"We don't know who had the drugs or who smoked them, so it will be hard to link them with any individual," Mr Lindgren said.
Lars Bystrom from Stockholm police said: "When they opened the door, one of our officers said it smelled of marijuana."
The drugs have been sent for analysis and Mr Lindgren said the police did not plan further action unless they got more information.
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 as he tried to escape a crowd of journalists. He collapsed backstage during a London concert and cancelled a performance in Portugal.
In Britain, the 19-year-old singer struggled with his breathing and fainted backstage at a London show. He was taken to a hospital, only to be caught on camera clashing with paparazzi.
In Germany, the Canadian teenage idol had to leave his monkey in quarantine since he didn't have the necessary papers for the animal. In Norway, where Bieber enjoys enormous popularity, education officials in a remote district rescheduled mid-term exams for high school students so that the singer's fans could attend the concert. (© Daily Telegraph, London)