A women and boy hit by a car following a police chase are said to have non-life threatening injuries.
The car drove off after the collision before hitting a wall on Park Lane near Tottenham.
Officers stopped to help the two victims and those inside the car fled the scene. The pair were treated by emergency services before being taken to a nearby trauma centre.
Police are appealing for witnesses to come forward after a 16 year-old boy was hit by a car in Hayes. The green Daewoo Matiz failed to stop at the scene on Uxbridge Road though officers later traced the car and arrested the driver. The boy is in a serious condition in hospital with head injuries.