Drugs found on Justin Bieber's tour bus in Sweden

Justin Bieber

STOCKHOLM - Swedish police said on Thursday they had found a "small amount" of drugs on Canadian pop star Justin Bieber's tour bus while he was performing in Stockholm.

"We conducted a search of Justin Bieber's bus and found a small amount of drugs," Stockholm police spokesman Lars Bystroem told AFP.

Police made the find around 8:00 pm on Wednesday evening during a raid on the empty bus, which was parked outside the Globen arena where the 19-year-old singer was performing.

The officers in charge of security around the Grand Hotel where Bieber was staying reported a strong odour of marijuana wafting from the bus before the singer and his entourage left for the concert venue.

They then contacted the Stockholm police drug squad, Bystroem said.

A source close to the situation told Swedish tabloid Aftonbladet panic broke out in the Bieber camp when the raid was being carried out.

"Some dancers ran around shouting: 'No weed!' and another member of the team yelled "S-t! The stash," said the source.

The police said it was unlikely any arrests would be made. "We have no suspect," Bystroem said, adding that the drugs were currently being analysed.

Bieber himself appeared to be referring to the event on Twitter Thursday afternoon when he wrote: "Some of the rumours about me... Where do people even get this stuff."

An electric stun gun that in Sweden requires a special permit was also seized in the bus.

Bieber made headlines earlier this year when he was photographed smoking a joint.

Before coming to Stockholm, Bieber played to sold-out venues in Norway and Denmark. In Sweden he surprised fans with an impromptu dance performance outside his hotel.

But the teen idol's European tour has been marred by controversy.

Earlier this month, Amsterdam's Anne Frank museum defended Bieber amid a furore over his comments that he hoped the Jewish teen who died in the Bergen-Belsen concentration camp would have been a fan.

And in Germany, animal rights activists asked him to apologise for bringing a 14-week-old capuchin monkey into the country without the proper paperwork.

Ontario-born Bieber shot to fame in 2009 two years after he began posting videos of himself on YouTube covering songs by artists like Usher and Stevie Wonder.

His biggest hits include "Baby", "As long as you love me" and "Boyfriend".