An 18-year-old pupil was detained in western France on Monday after stabbing his schoolteacher in the face and fleeing, authorities said. The teacher from the town of Chemille-en-Anjou in western France “suffered a facial injury that is not life-threatening”, said a joint statement from the authorities including the prefect and public prosecutor. After the attack at the Lycee de l’Hyrome on Monday morning, the suspect quickly left through the window, abandoning his weapon, according to the authorities. He was detained by gendarmes and municipal police. The officials said in the statement that the young man was not previously known to…