In Jharkhand, Maoists have burnt down six vehicles on NH 75 at Nava village in Chatarpur area under Palamau district. Police sources have told our Ranchi correspondent that incident happened on Thursday when these trucks, carrying food grains, fruits and animal fodder were set on fire by some 50 armed Maoists. There was no casualty in the incident.Police have launched a combing operation to nab the culprits.