A university in Nigeria has sparked outrage after a video went viral showing female students being touched to see if they were wearing bras before taking part in an exam.

In the footage, female staff at Olabisi Onabanjo University in south-western Ogun State are seen touching some students' chests as they queue to enter an examination hall.

The university has not yet commented on the video, but a student leader defended the bra policy as being part of the institution's dress code aimed at maintaining "a distraction-free environment".

However, he acknowledged that other ways were needed to enforce the policy that has been condemned by critics as archaic, sexist and likened to sexual assault.

A senior official at campaign group Human Rights Network told the BBC that students could sue the university for violating their rights.

"Unwarranted touches on another person's body is a violation and could lead to legal action. The university is wrong to adopt this method to curb indecent dressing," Haruna Ayagi said.

A student who did not want to be named told the BBC that the university enforced a strict moral code despite not being a religious institution.

She said their clothes were always being checked.

In response to the outcry, the president of the university's students' union, Muizz Olatunji, said on X that the university promoted "a dress-code policy aimed at maintaining a respectful and distraction-free environment, encouraging students to dress modestly and in line with the institution's values".

He added that the policy was not new, and the union had "engaged with the institution to explore alternative approaches to addressing indecent dressing, focusing on respectful and dignified interactions between students and staff".

He also published the dress code, which included a ban on any clothes "capable of making the same or opposite sex to lust after the student in an indecent manner".

The university was founded in 1982 as Ogun State University when Olabisi Onabanjo was state governor. It was renamed after him in 2001.