Another child has been approached by a man in a vehicle in Woonona, making it the third such incident in the suburb this month.
Police said a 13-year-old girl was riding her bike in Blueberry Circuit when the incident happened about 3.50pm on Tuesday.
The girl said that a van drove up and parked behind her before the driver then said something to her.
The van was white with no side doors and there were two men in the front seats.
The driver is described as a Caucasian male, in his late 30s to early 40s, clean-shaven and wearing a black cap with white outline and a black polo shirt.
The van's passenger is described as a Caucasian male, in his mid-30 with black, shoulder-length, curly, frizzy hair and stubble.
He was wearing a black cap and a black hooded jumper.
The incident is the third reported to police in Woonona in three weeks.
On May 7, a man in a red or brown small sedan called out to a seven-year-old boy on Pioneer Drive, asking him to get in his car. The man was described as Caucasian in appearance, about 30 to 40 years old, and clean-shaven.
On May 19, a 10-year-old boy was approached by a man in a van while walking home from school.
The boy was walking along a footpath on Woodland Avenue - which runs into Blueberry Circuit - about 3pm when the man yelled out to him from a red van.
The van stopped across the road and the man again yelled out to the boy before driving off.
The man was described as Caucasian with a tanned complexion, about 35 years old, with hairy arms, a beard and dark brown hair.
He was wearing a faded blue T-shirt and had a small hoop earring in his left ear.
The van was described as red with a dented driver's door, a broken side mirror and a yellow sticker with writing on it.
Police on Tuesday said they did not believe the incidents were linked as the descriptions of the men and vehicles were different.
Anyone with information on any of these incidents is asked to call Crime Stoppers on 1800 333 000.