Two truckers from Bihar were killed on the spot when their Hyderabad-bound vehicle overturned on the NH-65 here Wednesday evening. According to the the police, the truck fell off the road into a ditch near Aitpamula village in the Kattangur mandal limits. According to the police, the two have been identified as driver 45-year-old Mahesh Prasad Yadav, and helper 22-year-old Pramod Kumar from Jehnabad district in Bihar. The truck belonging to one YBC Transport Services was coming from Bihar with a consignment of piping material to be delivered to a company at Hyderabad. The police suspect the vehicle driver might have fallen asleep at the wheel.