One person was killed on the spot, and five others were injured when the auto in which they were travelling collided with a KSRTC bus at Mordanapalle village of Yadamarri mandal, 10 km from here, on Thursday. The deceased was identified as G. Umapathi (45) of Gundlakattamanchi village. The condition of two of the injured is said to be serious. The injured were rushed to the Government Headquarters hospital at Chittoor. The driver was taken into custody, and the bus was seized. A case was registered.