Nine people, including five students, were killed after a private tourist bus hit a state-run KSRTC bus from behind at Vadakkenchery in Kerala's Palakkad, Kerala Road Transport Minister Antony Raju said on Thursday. The minister said the accident occurred around 11.30 PM on Wednesday when the private bus, which was travelling at a high speed, while attempting to overtake a car, hit the rear end of a Kerala State Road Transport Corporation (KSRTC) bus.