A man was seen driving suspiciously slowly past two young girls as they walked home from school.
The teenage girls were walking along Ash Crescent in Nuthall on May 16 when a man driving a van slowed down next to them. He did not say anything to the girls.
He was described as having ginger hair and a big nose and his white van had highway markings on the back of it.
The incident happened at 4pm.