The newspaper writes that the arrest took place early Tuesday morning in a house in the Stockholm suburb of Årsta.
The police confirm that there has been an action in the area related to an older investigation, but will not confirm the arrest.
Twelve-year-old Adriana was shot and killed in August last year outside a hamburger restaurant while airing her dog. However, the shot was actually aimed at someone else, according to police.
The police believe that it was two young people with links to criminal circles who were the real target.
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