A 13-year-old Dagenham schoolboy has been killed while riding his cycle in the town.
Thomas Stone died after a collision with a car in Bell Farm Avenue at 7.45pm on Tuesday.
The driver of the blue coloured Toyota Celica, a 20-year-old woman, left the scene but later returned. She was arrested on suspicion of causing death by dangerous driving and taken into custody at an East London police station.
Thomas, of Gay Gardens, who is reported to attend Eastbrook School, died at the scene.
Traffic officers are appealing for witnesses and information following the collision.
Enquiries into the circumstances of the collision are being carried out by the Road Death Investigation Unit at Chadwell Heath Traffic Garage.
Investigators are appealing for any witnesses to the collision, or anyone with any information, to call the RDIU witness line on 0208 597 4874.
A believed passenger in the vehicle, a 36-year-old man, has also arrested on suspicion of causing death by dangerous driving and also taken into custody at an East London police station.
He and the woman have been bailed to return pending further enquiries.