MILAN              -           In a bid to rob an armored vehicle, a gang of thieves set up barriers of burning vehicles and spilled nails on a highway near Milan but were foiled when the driver evaded their traps, according to news reports Wednesday. The assailants, believed to number about a dozen people, fled the scene. They remained at large following the attempted robbery on a major north-south highway late Tuesday night, the news agency La Presse reported. The assailants set a dozen vehicles on fire in both directions of the highway and rammed the armored vehicle with a tractor-trailer. But the attempted robbery ultimately failed when the driver of the armored vehicle managed to pull into a rest area and a police patrol in the area intervened.