A teenager is in a critical condition following a collision between a police car and a moped being ridden by three males.
At approximately 02:15hrs on Sunday, 16 July, a moped was in collision with a marked police car in South Park Road near the junction with Trinity Road, SW19.
The moped was being monitored by the National Police Air Service helicopter at the time of the collision as it was believed to have been involved in an earlier attempted robbery. The moped had been reported lost or stolen to police on 12 July.
Three males who had been riding the moped were taken to a south London hospital for treatment to their injuries.
A 16-year-old male is in a critical condition. A second 16-year-old suffered a serious injury to his leg and a 15-year-old sustained minor injuries.
All three males were arrested at the scene and two large knives were recovered.
The Directorate of Professionals Standards has been informed.
The incident has been referred to the Independent Police Complaints Commission.
Anyone who witnessed the collision is asked to call officers from the Serious Collision Investigation Unit at Merton on 020 8543 5157.