A motorcyclist's suffered what are being described as life threatening injuries in a road traffic collision in Morriston.
The 24 year old from Sketty was involved in an incident involving a grey Nissan Note on Mynydd Garnllwyd Road.
He's receiving treatment at Morriston Hospital.
The road was closed until around 6pm last night while officers from the force's serious collision investigation unit examined the scene.
No-one else was injured and there have been no arrests.
Officers would like to speak to anyone with witnessed the collision, who may have seen the vehicles before the collision, or who stopped to provide assistance.
Contact South Wales Police on 101 or Crimestoppers anonymously on 0800 555 111, quoting reference *077377.