Police are appealing for witnesses following a three-vehicle collision in Cowfold.
About 5.25pm on Saturday 26 June, a red Hyundai travelling eastbound on the A272, collided with a red Jaguar and a grey BMW travelling westbound.
The passenger from the Hyundai - a 14-year-old girl from Hurstpierpoint - was taken to hospital with serious injuries.
The driver of the Hyundai - a 21-year-old man from Hurstpierpoint - was arrested on suspicion of causing serious injury by dangerous driving and has subsequently been released under investigation, pending further enquiries.
The road was temporarily closed whilst investigative work took place but has since reopened.
Anyone who witnessed the collision, or captured it on dash cam, is asked to email collision.appeal@sussex.pnn.police.uk quoting serial 1138 of 26/06.
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