A man has died and a woman is in critical condition after a crash involving a moped, and possibly a second vehicle.
Police say it is unclear who the rider was on the moped which crashed at around 1am this morning on the A57 in Aston.
Officers believe a second vehicle may have been involved, which would probably have frontal damage.
They are appealing for the driver to come forward or anyone who has seen a damaged vehicle, that could have been involved in the collision.
Witnesses are asked to call police on 101 or Crimestoppers anonymously.
Police have closed Aston Way, which is near the M1 junction 31 roundabout and the fire station. It is likely to remain closed for several hours.