A 45-year-old man was attacked by a group of four men in Mosgiel.
Police are seeking witnesses to the assault on Severn St shortly after midnight on Thursday.
The man was approached and attacked by four unknown males.
He suffered multiple injuries and was knocked unconscious in the attack.
One of the attackers was described as having long dreadlocks. Another was tall and solidly built.
The victim was unable to describe the car the offenders fled in because he was still unconscious.
Anyone who witnessed the assault or has any information should contact contact Mosgiel police on 03 489 3534 or Crimestoppers, anonymously, on 0800 555 111.