King hit leaves Brisbane man critical

A Brisbane man will front court on Tuesday charged with a king-hit attack that left his victim with life-threatening injuries.

Police say the victim, 53, was walking with a woman in the Brisbane CBD on Monday afternoon when a man who was known to him punched him in the mouth, causing him to fall backwards and hit his head.

The victim was taken to hospital with life-threatening injuries. His alleged attacker, 25, has been charged with grievous bodily harm.