The detention is extended by two weeks, announces Södertörn's district court.
Prosecutor Kajsa Lindberg says that the picture of the event has become clearer.
But there are some information where the parties' statements differ, which we need to investigate further, she tells TT.
The prosecutor does not want to say anything more about what they know about the event.
We have some important interrogations to conduct, therefore I do not want to release more information now.
She confirms, however, that a live weapon was fired at the school, which had previously been unclear.
Yes, that's the reason why the charge becomes gross weapons offense, that it was a live weapon, she says.
The 15-year-old boy still denies the suspicions of attempted murder and gross weapons offense.
The school's principal Kaj Majuri has stated that there had previously been a conflict between the two 15-year-olds, but that they had not perceived any signals that something like this could happen.
The condition of the boy who was shot has improved and he is no longer in need of care. Kaj Majuri has said that the boy will not suffer any permanent injuries.