Thirteen on trial for petrol-bombing police in Paris outskirts A trial begins into an incident which profoundly shocked and caused acute anger within the French police force: 13 youths stand accused of violence with intent to injure by throwing petrol bombs at police cars during clashes in Viry-Chatillon, a town 21 km to the south east of Paris. \\n\\nessé des policiers en jetant des cocktails Molotov dans leurs voitures à Viry-Châtillon s'ouvre à Evry. IMAGES AND SOUNDBITES