A boy, aged 5, is seriously ill after being hit by a car on Teesside.
It happened at around 3.55pm on Sunday at the junction of Thorntree Road and Laburnum Avenue, Thornaby.
Cleveland Police say an initial collision, involving two cars, took place.
Three men - aged 19, 22 and 25 - who had been travelling in a Seat Ibiza were taken to the University Hospital of North Tees and were treated for minor injuries before being discharged.
A 5-year- old boy who had been on the footpath at the time of the incident suffered head injuries as well as cuts and abrasions to his body.
He is currently detained in James Cook University Hospital and is said to be in a poorly condition.
A 22-year- old man from the Thornaby area and a 24-year- old man from the Redcar area have been arrested on suspicion of a number of driving offences.
Any witnesses or anyone living on Thorntree Road who may have CCTV footage is asked to contact Cleveland Police.