Officers investigating a fatal collision in Spondon are appealing for witnesses and dashcam footage.
The collision, involving a black Kawasaki motorbike and a grey Mercedes A180, occurred in Nottingham Road at around 8.45pm on Thursday 1 February.
The rider of the motorcycle, a man in his 20s, was pronounced dead at the scene.
The driver of the Mercedes has not been arrested and is helping officers with their enquiries.
A 20-year-old man, who was driving a BMW 3 series seen driving with the motorcyclist in the moments before the collision, has been arrested on suspicion of causing death by dangerous driving. He has been released on bail as investigations continue.
We are keen to hear from anyone who witnessed the collision, or who has any dashcam footage.
If you can help with our investigation, please contact us using any of the below methods, quoting the reference 24000066086: