Police spokesman Lars Bystrom added a stun gun was also found on the empty ... - Daily Mail

Swedish police say they found drugs in the 19-year-old Baby singer's blacked out tour bus while it was parked outside his hotel
Officers 'smelt cannabis coming from inside the tour bus'
Police spokesman Lars Bystrom added a stun gun was also found on the empty bus
Searched during Bieber's concert on Wednesday evening
Police refuse to identify the drug until laboratory tests have been completed and added they don't suspect anyone
In January 2013 Bieber apologised to fans after pictures emerged of him smoking a suspicious looking cigarette
Bieber's has an estimated personal wealth of around Â£70million and an army of devoted fans called 'Beliebers'

By Lucy Buckland and Fay Strang

PUBLISHED: 08:50 EST, 25 April 2013 | UPDATED: 10:55 EST, 25 April 2013

Swedish police have found drugs on pop sensation Justin Bieber's tour bus.

Police spokesman Lars Bystrom revealed a small amount of drugs and a stun gun were found when officers raided the empty bus parked under the Globen concert venue in Stockholm, where Bieber was performing on Wednesday.

They have refused to reveal identify which drugs were discovered on the blacked out bus - but said officers ordered the search after they 'smelt cannabis' coming from the vehicle earlier that day.

Clubbing: Justin Bieber has been partying heavily at the Rose nightclub in Stockholm

Clubbing: Justin Bieber has been partying heavily since he arrived in Stockholm - pictured here yesterday at The Rose nightclub

Cause for controversy: Justin Bieber was photographed holding a cigarette during a party in Newport Beach, California on January 2

Bieber apologised in January after being pictured smoking a suspicious looking cigarette in a hotel room with friends.

Bystrom said Thursday they have no suspects and no one has been arrested. He declined to identify the drug, saying it had been sent to a laboratory for an analysis.

He says police acted after smelling marijuana coming from inside the bus when it was parked outside the hotel where Bieber was staying.

Drugs bust: Swedish Police said they have found drugs on Justin Bieber's tour bus (pictured) - officers often surround the bus to protect the singer from fans

Pungent smell: Officers said they smelltmarijuana coming from inside the bus when it was parked outside the hotel where Bieber was staying.

The drug squad was alerted and searched the bus during the concert.

Bieber is in Stockholm as part of a world tour and bratty behaviour has caused controversy in recent months, taking him from squeaky clean teen favourite to rebel superstar.

Bieber's reported attitude struck again after he took on cosmetics giant Elizabeth Arden.

From squeaky clean teenager to party animal: The Canadian superstar was spotted partying the night away in Stockholm

Raid: While Bieber was performing onstage at the Globe Arena on April 23 (pictured) drugs officers were tearing through his empty tour bus

The Canadian pop star is said to have thrown a temper tantrum when taking part in a paid photoshoot in Copenhagen, Denmark over the weekend.

The chart topping star got things off to a bad start as he allegedly showed up six hours late for the shoot.

A source claimed to RadarOnline.com that Justin's actions were simply 'disgraceful'.

The insider told the website: 'After showing up six hours late, Justin threw a temper tantrum because they wanted him to wear a bell boy hat â€" but he refused.

'This kid is quickly getting a reputation as someone that no one wants to work with. It was disgraceful.'It is latest scandal to hit the previously squeaky clean star.

Apologies: Bieber told fans he was sorry after being pictured with a suspicious looking cigarette

Fall of an angel: Pictures Justin Bieber's Calabasas mansion emerged on March 19 this year, with alcohol and Shisha pipes

Swedish police say drugs have been found on Justin Bieber's tour bus (pictured him in Stockholm yesterday)

Tempus fugit: Justin Bieber has been accused of arriving six hours late to a photoshoot in Copenhagen, Denmark, over the weekendÂ

Bieber dances to his tour bus in a onesie.

Justin has an estimated personal wealth of around Â£70million, but he was also accused of refusing to leave a tip after dining at a high end restaurant.

The singer was joined by his beautiful girlfriend Selena Gomez at the classy restaurant where they were said to be treated to a free meal.

A source told the website the couple went to 'a very upscale restaurant on Friday night for a free meal and even though the meal was complimentary, Justin couldnâ€™t be bothered to tip the hard working waiter.

Riled: Justin had to be held back by a member of his entourage as he appeared to lash out at a photographer just hours before

Riled: Justin had to be held back by a member of his entourage as he appeared to lash out at a photographer in March

Is it all too much? The 19-year-old singer seemed to be visibly enraged by something the snapper said as he prepared to make his way to a waiting vehicle earlier this year

Empty seats: As Bieber came onstage expensive front row seats were empty - as younger fans were forced to leave

Empty seats: Bieber sparkled speculation he was having a meltdown after he was late for his fans in London, forcing them to leave without seeing him perform

'It was very low class and just disrespectful. Selena acted like a true lady, but Justin acted like an entitled punk.'

UK fans will remember Bieber's 'meltdown' in the London after he was caused outrage when heÂ turned up to his debut night at the O2 on March 5 a reported two hours late.

Although he disputed the timings and claimed he was only 40 minutes late on stage, hundreds of children were left heartbroken at being forced to leave without seeing their idol in person - as the concert was taking place on a weekday.

Stocking up: Justin's entourage made a stop at the OnePiece store to pick up some extra pieces

The day after his lateness the Baby singer lashed out at a photographer in a foul-mouthed rant after one shouted that Justin should 'f**k off back to America'.

Pushing his way out of the vehicle and shoving past members of his entourage, Justin fumed: 'What the f**k you say? What d'you say? I'll f**king beat the f**k out of you, man!'

With his face grimaced up in anger, the star had to be held back by a member of his security team as he attempted to grab the camera from the photographer.

The star was spotted letting out his inner child by messing about in a bright red all-in-one earlier in Stockholm, before police revealed the results of their raid.

Completing his look with a pair of red Givenchy trainers and a black and white cap the superstar was being hilarious with his cool moves.

He grew so fond of his onesie that he kept it on and went out to the Rose Club in Stockholm, Sweden, following his concert in the capital.

A Bieber spokeswoman declined to comment.