Police are hunting a man who is alleged to have exposed himself to two 13-year-old girls who were standing at a bus stop in South Normanton.
The incident happened shortly after 1pm on Saturday, September 17 at a bus stop in The Common.
The man then walked off towards the junction with Market Street.
A photograph has been released of a man police want to speak to in connection with the incident.
Although his face is not shown, police hope someone might recognise his clothing, particularly his red top and trainers.
Witnesses or anyone with information should call PC Dan Bird on 101, quoting reference 16000282644.
Alternatively, send him a message online by visiting the Contact Us section of our website www.derbyshire.police.uk/Contact-Us.
You can also call Crimestoppers on 0800 555 111.