Three Cape Town pupils who took part in a sex video while on school grounds have been identified and expelled, it was reported on Wednesday.

The Cape Flats pupils were identified after the Daily Voice handed the footage to the Western Cape education department.

The footage, which is more than a minute long, showed a boy and girl in their teens, having sex while a third person recorded the act.

The boy was seen sitting on a chair with the girl on his lap. Both were in school uniform.

According to the report, he was seen smiling and showing gang signs to the camera. At the end of the clip, the girl looked up, realised she was being filmed and hid her face in embarrassment.

"The department can confirm that the incident did happen at a school in the Western Cape. The incident occurred last year," said Bronagh Casey, spokeswoman for education MEC Donald Grant.

"Once it was brought to the school's attention, a disciplinary meeting was held and a recommendation for expulsion was made, which was upheld by the department."

The school was not named to protect the teenagers' identities. They were in Grade 11 at the time.