A mob of people burnt down three tractor-cum-trolley at Pandeypura village under Paton police station in Palamu, said Palamu SP Patel Mayur Kanhaiya lal.
According to the SP, one tractor had hit a 57-year-old woman early in the day, who succumbed to her injuries.
Following her death, the mob set ablaze three tractor-cum-trolley. Drivers escaped unhurt.
Police have registered two cases one of the death in road accident and the arsoning of three tractor-cum-trolley. No arrest of any arsonist has been made till now by the police.