Medical professionals are struggling to provide an explanation as to what caused the phenomena which saw 80 students at the Elsa Perea Flores school in Tarapoto, northern Peru, faint and have seizures, with some of them uncontrollably screaming.
Local villagers claim it was a case of “demonic possession” and authorities were immediately called to the scene.
According to reports in local media, the school is built on an old cemetery while the pupils say “games” which are intended to evoke spirits are commonly played during break times.
Dr Anthony Choy told the Pan-American TV channel many students continued to experience “crises” in the days following the event.
Healthcare professionals also believe that whatever is causing the strange event could be contagious, and warned locals to stay vigilant.
Elsa de Pizango, mother of one of the students, said of her daughter: “She fainted at school. They don’t explain anything in the hospital.
“She simply fainted and there was foam coming out of her mouth.”
One of the students, who wished to remain anonymous, added: “I felt as he strangled me. My friends say that I was screaming desperately, but I do not remember what happened.”
To add to the eerie occurrences, students claim to have seen a tall man dressed all in black and with a big beard around the premises.