Police are appealing for information to help identify a man who performed an indecent act in Nelson.
The incident happened at around 8am on a walkway on Annesbrooke Drive.
He is of a medium build, in his 20s to 30s, has short dark hair and tanned skin.
He was wearing dark coloured clothing and drove a black van with a large, fluffy, black dog inside.
Police urge anyone with information that could assist them in identifying this person to contact police on 105 and quote file number 220512/3662.
Alternatively, information can be given anonymously via Crime Stoppers on 0800 555 111.