A drug-sniffing dog was able to detect the presence of drugs on board, reported Aceshowbiz.
According to Chief Customs and Border Protection Officer Ken Hammond, weed and drug paraphernalia were subsequently uncovered from the search. After the items were seized, the driver was issued a citation and the passengers, who did not include Bieber, were eventually released.
This is not his tour bus' first brush with a drug-related controversy. Back in April, it turned up a small amount of narcotics and a taser after it was searched in the Globe Arena in Stockholm, Sweden where Bieber was performing a leg of his "Believe" world tour.