Teenager seriously injured in Sheffield collision

Police investigating a collision in which a 15-year-old boy was injured are asking witnesses to come forward. 
The boy, who was running along Eastern Avenue, Sheffield, at about 10.30am yesterday (Saturday 6 May), is currently in hospital in a serious but stable condition after being involved in a collision with a single-decker bus. 
The bus was travelling towards the city centre, prior to the collision. No one else was injured during the incident. 
Did you see what happened? If you can help officers, please call 101 quoting incident number 351 of 6 May 2017.