Two teenagers have died after the car they were travelling crashed into a tree.
Four male teenagers who were in an Opel Astra following the Peugeot 306 which crashed in West Sussex have been arrested on suspicion of causing death by dangerous driving.
Emergency services were called to the A264 near Slinfold, Horsham at around 8.10pm yesterday.
The 18-year-old male Peugeot driver died at the scene of the crash and a 19-year-old male passenger was taken to St George's Hospital, London for emergency treatment but died this morning.
Two other passengers, an 18-year-old man from Billingshurst and a 17-year-old girl from West Chiltington, have been taken to Royal Sussex County Hospital with non-life threatening injuries.
The road was closed for about nine hours for rescue, recovery and collision investigation work.
Delays of up to 20 minutes on Southern Trains between Horsham and Victoria due to a signalling problem at Warnham.