Four people, including a child, have died after two vehicles collided in South Yorkshire following a police pursuit.
VW Touran people carrier, The Darnall area of Sheffield on Friday night.
Police had been pursuing three men, aged 23, 17 and 18, who were traveling in the Gulf. They have now been arrested and remain in custody after suffering minor injuries.
Two men aged 35 and 50, one of whom was the driver, and one 41-year-old woman – all traveling in the Touran that had not been pursued by police – were pronounced dead at the scene. A one-year-old boy was pronounced dead at hospital.
Three other passengers were injured. A 22-year-old woman is in a critical condition, a second-person woman remains in a serious condition, while a three-year-old girl is being taken to hospital with life-threatening injuries.
South Yorkshire police appealed for dashcam footage of the collision.
Det Chief Insp Jude Ashmore said, "First and foremost, my thoughts are with the families of the victims who have lost loved ones during this incredibly tragic incident.
This morning to assist.
"Our priority now is to support the victims' families and those affected, and to work hard to determine the exact circumstances.
The Independent Office for Police has launched an investigation.
Its regional director, Miranda Biddle, said: "As soon as we were informed, we are investigating the scene and we are carrying out an investigation into the South Yorkshire police action prior to the crash.
"This is a standard procedure when you are following an incident involving the police. This is a car accident in which one of the vehicles is involved.
During the course of our investigation we have received initial statements from the officers involved.
The area in the vicinity of the crash is expected to remain closed for most of Saturday.