A man from Pevensey’s had to be cut free from his car after a crash on the A259 near Hooe.
The 55-year-old’s grey Seat was in a collision with black Ford on Saturday night (23 April) around 10.30pm.
His passengers, a 55-year-old woman and a 14-year-old girl, were also hurt, but didn’t need hospital treatment.
The four people in the Ford, who were all from Bexhill, were taken to hospital as a precaution.
The road was closed until around 4am on Sunday (24 April) for recovery work.
Four people were initially arrested at the scene, but then de-arrested pending further enquiries.
A 28-year-old man from Bexhill was subsequently arrested on suspicion of causing serious injury by dangerous driving, driving without a license, failing to stop after a road accident and driving without insurance. He was bailed until 28 June.
Sergeant Stacey Ellott said: "We would like to hear from anyone who was in the area at the time and who saw the collision and/or what happened immediately before or after.
"Witnesses can email firstname.lastname@example.org or call 101 quoting reference 1489 of 23/04."