A man and woman have been arrested after a 12-year-old girl died in a hit-and-run on a motorway.
Five other people were injured in the collision involving a Vauxhall Corsa and a Nissan Qashqai on the M61 near Chorley, Lancashire on Saturday night.
Sana Patel, from Blackburn, was a passenger in the Nissan and died at the scene.
The occupants of the Vauxhall fled the scene on foot and Lancashire Police urged them to "search their conscience" and come forward.
In a statement on Sunday evening, the force said a 23-year-old woman from Mirfield in Yorkshire had been arrested on suspicion of death by dangerous driving.
A 28-year-old man from Dewsbury in Yorkshire was later arrested on suspicion of death by dangerous driving and failing to stop at the scene of an accident.
Both remain in custody.
The collision happened around a mile from junction eight for Chorley at around 10.45pm on Saturday.
The five other people in the Nissan were treated for minor injuries.
The M61 was closed in both directions between junctions six and eight while investigators attended the scene. The motorway was reopened at around 9am on Sunday.
Police have urged anyone with information about the collision to contact them.