Sambalpur: Nakti Deul police seized an unregistered red tractor carrying around 83 kg of ganja packed in four gunny bags and concealed in a specially built compartment beneath its trolley on Saturday. Acting on the tip-off, a special police team launched a search around 1.40 pm, said additional SP Ajay Kumar Mishra.The tractor was going from Mushakani village towards Batgaon when police started following it. Sensing the chase, the driver left the tractor in a forest near Telisingha chowk and fled. Police searched the area but could not find him. Efforts are on to identify the owner and driver. The market value of the seized ganja is yet to be assessed.