POLICE are investigating the circumstances surrounding an assault in Mildura in the early hours of March 30.

It is believed a man approached a woman at Deakin Avenue about 12.40am and assaulted her.

The alleged offender is described as Caucasian, aged 16-20 years, about 160-170cm tall, with brown hair, and he was wearing a white t-shirt and light-coloured shorts.

Investigators have released an image of a male who they believe may be able to assist with their enquiries.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au