Police have released CCTV images of a man they want to speak to as they investigate two incidents of wilful exposure to children at a Gold Coast shopping centre.

In one incident, police say around 12.20pm on Wednesday September 28, an eight-year-old girl was sitting with her mother at a food-court restaurant at the Biggera Waters shopping centre when a man exposed himself to the girl before leaving.

Around 12.45pm on Wednesday October 12, a four-year-old girl was sitting in a different food-court restaurant with her mother when a man sat at the table next to her and exposed himself to the girl, before leaving.

A security guard sighted the man on Tuesday October 25.

Police allege the man strategically positions himself at a table so the children’s parents are unaware.

Detectives are now appealing to anyone who may recognise the man, or any further victims, to come forward.