A top university graduate was caught secretly taking upskirt photos, police said on Wednesday.

According to Gwanak Police Station in Seoul, the 28-year-old man allegedly took photos of a female student in Seoul National University campus on Sunday. She was studying in front of him at the school’s library.

The suspect, who is currently attending another school, is a graduate of Seoul National University.

A witness reported the incident to a security office at the university, and called the police afterwards, police said.

The SNU alumnus told the police during the questioning that he could not “resist the temptation” to take photos.

Police seized the man’s cellphone as evidence and sent it to a digital forensic agency for further details.

By Bak Se-hwan (sh@heraldcorp.com)