Previously, a 16-year-old boy was arrested on suspicion of aiding and abetting murder and attempted murder after the attack at a school in Fagersta.
The boy is also a suspect in another case involving preparation for murder in the Stockholm area. Now it appears that there is another suspect, according to documents in the case that SVT refers to.
Prosecutor Kajsa Frisk does not want to comment.
"I can't say anything about it at the moment," she tells SVT.
