Two teenagers who died after the silver Peugeot 306 they were travelling in left the road and collided with a tree in Slinfold, Horsham, on Friday 5 July have been named by police.
They were William Richardson, 18, of Hayes Lane, Slinfold, who was driving the Peugeot 306 and his passenger Asa Caudill, 19, of Arun Road, Billingshurst.
Mr Richardson died at the scene and Mr Caudill was taken to St George’s Hospital London for emergency treatment but also died on Saturday morning (6 July).
Police and emergency services, including West Sussex Fire and Rescue, were called to the A264 Five Oaks Road near Fulfords Hill at around 8.10pm on 5 July.
Two other passengers, an 18-year-old man from Billingshurst and a 17-year-old girl from West Chiltington were taken to the Royal Sussex County Hospital, Brighton, one with serious but non-life threatening injuries and the other (the girl) with minor injuries.
Four men who were travelling behind the Peugeot in a silver Opel Astra, were arrested at the scene on suspicion of causing death by dangerous driving. Two aged 18 and one aged 19 have been released with no further action.
The driver of the Opel Astra, an 18-year-old man from Billingshurst, has been released on bail until 28 August pending further enquiries.
Sergeant Alan Spicer from the Roads Policing Unit said: “All fatal road traffic collisions are tragic but even more so, when it involves young people just starting out in life.
“I would appeal to anyone who witnessed the collision and has not yet spoken to officers to please do so as a matter of urgency. We would also like to hear from any other drivers who saw the silver Peugeot or the silver Opel Astra prior to the collision. Please call 101 quoting Op Marline or email email@example.com
The road was closed for around nine hours while rescue, recovery and collision investigation work took place and police would like to thank drivers for their patience.