Justin Bieber pot was found by border agents at the border between Detroit and Windsor, Canada. Justin Bieber wasn’t on the bus at the time. Justin Bieber was getting ready to perform at the Joe Louis Arena later that night. This was the second time in four months that pot was found on Justin Bieber’s tour bus.

U.S. border agents searching Justin Bieber’s tour bus for pot found found marijuana as it crossed into Detroit from Windsor, Canada, according to the Detroit Free Press. Police found pot on a Justin Bieber tour bus in Stockholm, Sweden in April after officers noticed the smell of weed coming out of an open window.

In a statement, the U.S. Customs and Border Protection said “The tour bus, associated with musician Justin Bieber, was en route to a concert scheduled later Sunday night in Detroit. During the secondary inspection, a K-9 alerted to the presence of drugs and a subsequent search of the bus revealed marijuana and drug paraphernalia. Officers seized the marijuana and paraphernalia and issued a penalty to the driver. The bus and passengers were released without further incident.”

U.S. Customs and Border Protection spokesman Ken Hammond confirmed that Justin Bieber’s bus was stopped and search when it tried to enter the United States on the Ambassador Bridge. Justin Bieber was not on the bus when it was searched. Hammond said that, during a secondary inspection, a police dog sniffed out a small amount of pot and drug paraphernalia were found. The police seized a small amount of pot intended for personal use. A border patrol spokesman said that the bus driver was cited but the passengers were then released. No arrests were made because it could not be determined who owned the drug. No further details were available.

In March, border authorities at the same check point, the Ambassador Bridge, found that a passenger on a Rihanna tour bus had a small amount of pot. Rihanna was not on the bus at the time.