Two teenage girls allegedly sexually assaulted at Goulburn Valley beach

Despite thoroughly investigating the matter and exhausting several avenues of inquiry, detectives are yet to identify the alleged male offender, police said.

Investigators have released an image of a man they believe may be able to assist with their inquiries.

Anyone with information that could assist police in identifying the man is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at crimestoppersvic.com.au