Man, 34, in hospital after Kirribilli fall

A man has suspected head and internal injuries after falling down a cliff on Sydney's north shore.

About 1.30am on Thursday emergency services were called to a reserve on Olympic Drive at Kirribilli after reports a man had fallen between a rock face and a walking track, NSW Police said.

The 34-year-old was pulled to safety and rushed to the Royal North Shore Hospital with suspected head and internal injuries.

The hospital has confirmed the man is in a serious condition.