Detectives from Box Hill Sexual Offences & Child Abuse Investigation are investigating an incident which occurred in Surrey Hills last month.
Investigators have been told a 20-year-old woman and her friend were walking near Wattle Park about 10am on 15 April.
As they approached the intersection of Warrigal and Riversdale Roads they were catcalled and whistled at by a man who was seated on a nearby bench.
The 20-year-old woman looked back and saw the man rubbing his crotch.
On Monday, 27 April the 20-year-old was running along Warrigal road when she encountered the same man.
He wolf-whistled her and she continued on her run but on her return she was confronted by the man and had to cross the road to avoid him.
Investigators have released a computer generated image of a man they believe may be able to assist them with their enquiries.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or to make a confidential report at www.crimestoppersvic.com.au
