A 10-year-old has been taken to hospital with potentially life-threatening injuries.
It is understood he was in a collision with a Toyota Avensis in St Thomas Road, at the corner of Portland Street , in Pear Tree, Derby, today at about 3.30pm.
He was taken to Royal Derby Hospital.
The road has been closed off by officers who are still at the scene.
Kudsia Batool, the headteacher at Pear Tree Community Junior School, said she understood the boy involved in the accident was a pupil at the school.
But she said she believed the accident did not happen outside the school but some distance away, at the junction.
Wreya Faraj works in Super Polski, a western European food shop in Portland Street.
He said: "I saw people outside the shop looking worried so I went outside and then I saw the boy on the floor in front of the car. People were trying to help him. And then the driver got out to help him as well. The boy looked unconscious."
On Facebook, Tony Chapple said: "My wife rang the ambulance service for him. Hope the little mite is ok. I nearly got run over there this morning."
Derby Update, Services 38, 40 & 41 diverted: St Thomas Road/ Walbrook Road has been closed due to a police... http://t.co/m2K7iv0aUM
— Arriva Midlands East (@arrivamidlandsE) October 3, 2014
whats happening on st thomas road near the vulcan all roads closed off
— Becky Kooner (@beckykooner) October 3, 2014
The car was recovered and the road reopened at about 6pm.