Police are appealing for public assistance after a 19-year-old woman was assaulted in Everton Park this morning.

Around 7.40am, the woman was walking on a footpath on South Pine Road between Halle Street and Nitawill Street when she noticed a man walking towards her.

The man grabbed the woman by her shorts, causing the woman to scream. A passing motorist in a white utility stopped and asked if the woman was okay, at which time the offender fled the scene on foot.

The man is described as Caucasian, aged in his early 30s, approximately 185cm tall with a large build and blonde hair.

He was wearing beige shorts and a collared polo shirt with a grey, blue and red pinstripe pattern.

Police are appealing for assistance to identify the man fitting the description and are appealing for anyone who may have dash cam vision of the area to please contact them.

Police would also like to speak with the motorist of the white utility who stopped to help the young woman.

Investigations are continuing.

If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting.

You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, via crimestoppersqld.com.au 24hrs per day.