The Tour feed also posted a tweet warning spectators to "respect the riders," as endangering them can lead to up to three years in prison.

• Thomas says he is still riding for Chris Froome despite win 
• Froome fourth on stage behind Dumoulin and Bardet

Bauke Mollema won the 15th stage of the Tour de France on Sunday in a solo breakaway to Le Puy en Velay as Chris Froome retained the leader’s yellow jersey.