The Bahrain team competing at the Tour de France was raided by French police ahead of Thursday's stage as part of a doping investigation, according to judicial and police officials.
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The team confirmed in a statement that riders' rooms were searched by officers at the hotel it stayed in in the southwestern city of Pau.
In a statement to The Associated Press, the Marseille prosecutor in charge of the case said a preliminary investigation targeting members of the team was opened on July 3 "for acquisition, transport, possession, import of a substance or method prohibited for use by an athlete without medical justification."
About 25 officers from a special public health unit in charge of the case were involved in the search, according to police.