Two more men have been arrested on suspicion of causing death by dangerous driving after a cyclist was killed in a crash with a Mercedes.
The cyclist, a man in his 50s, died at the scene on Watton Road, at the junction with Colney Lane, Norwich, at about 05:10 GMT on Thursday.
The motorist was also arrested on suspicion of drink driving.
He and the two occupants of the car were also suspected of perverting the course of justice.
All three, who were aged in their 20s, were questioned and released on bail, Norfolk Constabulary said.