Two 17-year-old trainees took humiliating pictures of elderly residents at a care home and spread them via Snapchat. Now their school has reported them to the police.

"If it had been my mum who had been photographed in this way, I would have been very upset. It is unacceptable and it just cannot happen," Tommy Rosengren, head of department at the Universitetsholmen upper secondary school in Malmö, told the daily Sydsvenska Dagbladet.

The students are training at the school to become health care assistants. As part of their education, they will spend 15 weeks as interns or trainees at...