A French rider in the Tour de France has been arrested at his team hotel and suspended by his team in connection with a doping investigation.

Judicial officials said Cofidis rider Remy Di Gregorio was arrested Monday night. The officials requested anonymity because they were not authorized to speak publicly as the investigation is ongoing.

Officials said two other people suspected of supplying Di Gregorio with banned substances were arrested — one along with the rider in Bourgen Bresse, and another in Marseille.

Cofidis said in a statement that it will stay in the race but Di Gregorio is “provisionally suspended” pending the outcome of an investigation.

“The suspicion surrounding the rider that has been implicated, Remy Di Gregorio, led us to strictly and immediately apply our team sanctions for breaking ethical rules,” the French team said in a statement.

Cofidis said Di Gregorio will be fired if convicted of any wrongdoing.

Di Gregorio’s team was staying in Bourg-en-Bresse on Tuesday, the Tour’s first rest day.

The investigation began last June and is led by the French police agency responsible for doping investigations, OCLAESP, and Marseille police.

The 26-year-old Di Gregorio was in 35th place after Monday’s ninth stage. The Marseille native turned pro in 2005 with French team Francaise des Jeux, and was once considered one of France’s most promising young riders.

When the investigation began last year, Di Gregorio was riding for Astana. He won one stage in the 2011 Paris-Nice race with the Kazahk team.

This season, he has had one stage win, in the Spanish Tour of Asturias in April.