Police have apprehended a man who was wielding a knife on the Tour de France route, according to French media. The incident occurred near the finish line of the fourth stage of the iconic event from Amiens to Rouen. Valeurs Actuelles said that a police officer suffered a minor hand injury during the incident. According to French media the incident took place around 3:30pm at the Saint-Hilaire roundabout, near Boulingrin, which is the finish line of Tuesday's stage. That is two hours before the