DETECTIVES investigating the serious sexual assault of a teenage girl have released a description of a witness they would like to identify.

The incident happened on Monday in Farsley.

The witness is described as a woman who was with a child and a Labradoodle dog.

A West Yorkshire Police spokesperson said: "Enquiries suggest she spoke to the 15-year-old victim shortly before the incident, which occurred at about 7.30pm on Monday, June 13 in Hainsworth Park, Farsley. 

"Officers are keen for this woman to speak with them and would also like to hear from anyone who witnessed any part of the incident, or who has any information that could assist the investigation.

"Anyone with information is asked to contact Leeds District Safeguarding Unit via 101, quoting crime reference 13220321683 or online via www.westyorkshire.police/101livechat."