A teenager has been arrested after allegedly flashing at Boston Central Park on Tuesday.
A 16-year-old male was arrested for an offence under the sexual offences act.
He has since been released under investigation.
Lincolnshire Police are appealing for witnesses and would like to speak to anyone who may have seen anything or anyone acting in a lewd manner near the main entrance to the park.
Police would like to speak in particular to a man and woman who were pushing a buggy and spoke to a member of park staff at the refreshment kiosk.
Anyone with information should contact police on 101 or via email at [email protected] quoting reference 298 of September 22.
Alternatively, it can also be reported through the independent charity Crimestoppers on 0800 555 111 or online here.
This is the second incident of its nature in Boston this month after a man with ginger hair allegedly flashed himself at a woman in her 20s.