"New suspicions have emerged as various people have been questioned. I have now also requested his detention on two new suspicions," prosecutor Lisa dos Santos told Aftonbladet.
The new suspicions concern an assault in June at Sigtuna School and a serious breach of the peace at the school in September.
The student has previously been suspected of two counts of unlawful coercion and two counts of assault.
Four more people are suspects, and eight people are plaintiffs. The suspected crimes include sexual harassment, aggravated assault and unlawful coercion.
