Lincolnshire Police are seeking information on a man who exposed himself to a local woman.
The incident happened at around 4pm on July 16, where a 46-year-old woman was walking along the cycle path between Stamp End, Lincoln and Washingborough.
Half-way along the path, a man was stood in a clearing with his trousers down, masturbating.
As she walked past, he looked over and continued. She left the scene but reported the incident to the police.
The male is white, 35 to 40-years-old and about 5ft 6in tall. He had a receding hairline swept over, and a small moustache and beard.
He was wearing a green khaki jacket and might have had a bicycle with him.
Anyone with information should contact PC Neal Thompson at Lincoln CID via the 101 number, quoting incident number 307 of July 16 or call Crimestoppers on 0800 555 111.