Police are investigating a crash that has left a cyclist in a critical condition, according to SA Police.
The crash occurred on Tapleys Hill Road, Adelaide Airport about 9.45pm tonight.
Police have blocked off all southbound traffic on Tapleys Hill Road from Burbridge Road while they examine the scene.
Major Crash investigators are attending.
Anyone who witnessed the incident or has any information is asked to call the police assistance line on 131 444 or Crime Stoppers on 1800 333 000 or online at https://crimestopperssa.com.au