It is believed the boy hit by an ambulance in Bath is 14-years-old.
He is in a serious condition after suffering a "significant" head injury.
More top news
After its meteoric five-year expansion, ITV News has learned a new legal challenge could have a costly impact on Uber's booming business.
Journalist Steve Hewlett, who shared his experience of battling cancer on BBC Radio 4, has died of the disease at the age of 58.
A long-time diplomat, Churkin had been Russia's permanent representative to the UN since 2006.