Police spokesman Lars Bystrom said a small amount of drugs and a stun gun had been found when officers raided the empty bus parked under the Globen concert venue in Stockholm, where the singer was performing on Wednesday."We smelled dope, really strongly, from inside the bus so we went and searched the bus that the smell of cannabis was pouring out of. But I don't think we should tell you what drugs we found on the weed bus."
He declined to identify the drug, saying it had been "sent to a laboratory for an analysis".
Police acted after smelling marijuana coming from inside the bus when it was parked outside the hotel where the singer was staying.