The anti-crime brigade intervened in Saint-Martin-d’Hères this Monday at the end of the day. Motorists had indeed just reported that young people were throwing projectiles at cars from the footbridge that spans the south bypass. The Grenoble police officers then set up a surveillance system and quickly noticed the presence of four minors throwing projectiles at the vehicles passing below. A priori, no victim or injured would have made themselves known. If one of the young people was able to escape, three on the other hand, aged only 13, were arrested and will be prosecuted.