Police are appealing for assistance after a man on a bike attacked a 14-year-old girl in Bonnyrigg, in Sydney's south west.
It is understood that the man fled on a bike after indecently assaulting a teenage girl and a woman, and threatening a teenage boy in separate incidents.
These encounters have taken place in parks in the area.
The 14-year-old was attacked on October 8 and the 48-year-old woman was assaulted on November 4 in Mount Pritchard.
A 14-year-old boy was also threatened by a man brandishing a knife in Mount Pritchard on November 4.