Eight people were killed and 18 injured in a bus fire accident here in Markapuram district on Thursday, police said.The victims were burnt alive.According to local TV channels, the bus collided with a gravel-loaded tipper.Police said some passengers sustained minor injuries and were undergoing treatment at a hospital, while officials continue to collect further information.”Eight people were burnt alive, and 18 injured have been rescued so far and shifted to hospital. Efforts are on to gather complete details of the incident,” Markapuram DSP Nagraju told a TV channel.Rescue teams are working to identify the victims and gather details of their relatives, who will be informed once verification is completed, he said.Nagraju said some bodies are still believed to be trapped inside the bus, which caught fire following the accident, making retrieval operations difficult.Meanwhile, Chief Minister N Chandrababu Naidu expressed grief over the loss of lives.