Tour de France leader Bradley Wiggins said he had suffered a slight burn to his arm after being hit with a flare near the end of the race's 226km 12th stage.
Wiggins (Sky) finished the stage 7 minutes 54 seconds behind stage winner David Millar (Garmin-Sharp) to retain his 2 minute 5 second lead over team-mate Chris Froome.
Wiggins later quipped that the flare-throwers, who had been running alongside the peloton as it raced to the finish, might have come off worse than he did after they were targeted in retaliation by water bottles thrown from the riders.
"I'm covered in all this yellow stuff," said Wiggins, referring to the powder which comes off flares when thrown.
"I got hit in the arm with a flare, burnt my arm a bit but it's alright. It's pretty dangerous, and I'm sure them guys are nursing a few wounds tonight because there were quite a few bottles in their direction."