Half a dozen officers kept watch outside the team bus at the Stage 15 start in Mende on Sunday.
Froome, born and bred in Kenya, said a roadside spectator shouting “doper” in French splashed him with urine in Stage 14. His teammate Richie Porte said someone punched him on a climb in the Pyrenees last week.
— Chris Froome (@chrisfroome) July 18, 2015
Froome said he spotted the spectator acting bizarrely about a third of the way into Saturday’s 178-kilometer (111-mile) west-to-east ride from Rodez to Mende.
“I saw this guy just peering around and I thought, ‘That looks a bit strange,'” he said. “As I got there he just sort of launched this cup toward me and said (in French) ‘Doper!’
“That’s unacceptable on so many levels.”
Sky have now contacted race organisers ASO to see if any more protection can be provided for the remaining stages of the race.
Additional reporting by Mashable