Yadadri Bhuvanagiri, March 6 : Three people were killed on-the-spot and several others injured, when a Telangana State Road Transport Corporation (TSRTC) bus hit them after collision with a tractor at Manthapuri Bypass, Alair Mandal in this district on Sunday. The accident occurred when the TSRTC bus was proceeding to Hyderabad from Warangal, police said. The victims were daily labourers hailing from Rayagiri in Bhuvanagiri Mandal. They were busy in Highway road work at the time of the accident. The injured were admitted to Government Hospital Alair for treatment. A case has been registered and investigation was underway, police added. VV RJ