A video of a man and woman appearing to engage in a sexual act in public is being investigated by police.
Officers are appealing for witnesses to the alleged incident of outraging public decency in Pingle Field, Bicester, Thames Valley Police said.
The act, which took place during daylight in the park, was filmed and circulated on social media before being published by The Sun newspaper.
The clip shows a parent strolling past the couple with a pram. Gravestones appear in the background.
The alleged incident took place just yards from the Oxfordshire town’s famous discount shopping centre.
The source of the video is also being investigated and police would like anyone who knows where the film came from to contact them.
Officers would also like to speak to anyone who witnessed the incident, which is understood to have happened on May 11, although the exact time is unclear.
Police are asking people who have seen the video not to share it further, but to report it as inappropriate content.
Investigating officer Detective Inspector Jon Capps, based at Banbury police station, said: “We would like to speak to anyone who was a witness to this incident.
“This happened in daylight hours in a very public area, and we believe there were many witnesses to this offence who have yet to come forward to police.
“We would also like to speak to the person who filmed the incident to assist with this investigation.
“Incidents of this nature are rare but we would like to remind and encourage anyone who witnesses incidents of this nature to report it to the police.”