A seven-year-old boy found with his throat slit in the toilet of the Ryan International School in Gurgaon was murdered by a schoolbus conductor who tried to sexually assault him, the police said today. "Bus conductor Ashok attempted to sexually assault the boy, when he raised an alarm the conductor killed him... Accused had been working here for the past six to eight months. He had gone to use the toilet where he saw the boy. He was not targeting that particular child, only when he saw the boy he thought of assaulting him.