Rihanna attends 'Wetten dass..?' From Freiburg on December 8, 2012 in Freiburg im Breisgau, Germany. (Photo by Dominik Bindl/Getty Images)
(WXYZ) - Customs and Border Protection tells 7 Action News Rihanna's tour buses were stopped at the Michigan and Canada border after an inspector smelled marijuana.
Ten buses in the Rihanna troupe were stopped and searched at the Ambassador Bridge, according to Customs and Border Protection.
Officers say drug-sniffing dogs detected marijuana on one of the passengers and he was cited with a civil infraction.
Rihanna was not on any of the buses, according to Customs and Border Protection.