The officers had been publicado 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 marihuana on the empty tour bus outside the hotel where Bieber was staying just before his concierto 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 o 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 dicho it smelled like someone had been smoking marijuana."
The drugs have been sent for analysis and Mr Lindgren dicho the police did not plan further action unless they got más information.
