Justin Bieber tour bus ‘searched for drugs’

Justin Bieber's tour bus has apparently been raided by police looking for drugs.

Swedish police reportedly searched Justin's bus in Stockholm on Wednesday on suspicion that there was marijuana on board. Officers allegedly uncovered a "small amount" of the illegal drug in the vehicle, along with a stun gun – which requires a permit.

The search took place after the bus arrived at the Globe Arena where Justin was due to perform.

"A police spokesman told Sweden's Aftonbladet newspaper they first detected a 'strong smell' of marijuana coming from the bus as they were controlling the huge crowd that had gathered outside Bieber's hotel," reports TMZ.

No arrests have been made as yet, and it remains unclear whether Justin was on board at the time of the search.

The suspected drugs have now been sent to a laboratory to be tested.

"We don't have any concrete suspicions against any specific person; there were several people on the bus," Stockholm police spokesman Lars Byström told Aftonbladet.

But the news comes as yet another setback for Justin this week, amid reports he is "gaining a reputation" for being difficult to work with after

throwing a tantrum on the set of a fragrance shoot in Denmark.

"After showing up six hours late, Justin threw a temper tantrum because they wanted him to wear a bell boy hat, but he refused," a source told RadarOnline.com. "This kid is quickly is quickly getting a reputation as someone that no one wants to work with. It was disgraceful."

It's not the first time Justin has seemingly shown disregard for his commitments.

The singer recently left fans waiting at his concert for more than an hour-and-a-half because he was reportedly playing a game of ping pong backstage with one of his dancers.

"Justin was completely engrossed in the game and couldn't be bothered," said a tour insider. "He knew he was starting the concert late, but he just didn't care."

It's not yet known what Selena Gomez thinks of the latest news about her on-off boyfriend. But sources say the singer, who was snapped kissing Justin in Norway last weekend, witnessed his behaviour first-hand on a recent diner date.

The pair went to "a very upscale restaurant for a free meal and even though the meal was complimentary, Justin couldn't be bothered to tip the hard working waiter," said RadarOnline.com's source. "It was very low class and just disrespectful. Selena acted like a true lady, but Justin acted like an entitled punk."

Justin will complete the Scandinavian leg of his tour in Helsinki on Friday.