An investigation is under way at one of the country's leading universities after students were alleged to have been caught having intercourse on camera during a safe sex ball.
The University of Exeter's students' guild has begun to look into the incident after footage from the event, during which an apparently naked couple appear to be having sex, was circulated on the internet.
The charity event was held just before Christmas.
A union spokesman said in a statement: "The students' guild recognises that confidential CCTV footage has been filmed without our permission.
"The guild is making sure the affected parties will be supported during this difficult time.
"Measures were in place to provide high levels of security, but we are aware that irresponsible behaviour has taken place and we are working hard to rectify the situation.
"A full investigation is under way in which action proportionate to the seriousness of the situation will be taken."
The university said it would be making no further comment.
Devon and Cornwall Police confirmed it had no plans to investigate the matter because a complaint of alleged criminal activity had not been made.
The University of Exeter recently accepted an invitation to join the Russell Group, which represents the UK's leading research-intensive institutions, while it has also been named in the top ten of several recent "good university" guides.