The person, who is under 18 years, was arrested earlier in the week suspected of aiding and abetting murder and was requested to be detained on Friday, says prosecutor Maria Hävermark to TT.
It was the night of August 25 that two men were found shot to death in a car in Kallhäll. Previously, another person had been detained suspected of aiding and abetting murder, but the person was released after a few days.
Maria Hävermark has no further details to provide regarding the detention but has previously told TT that the circumstances of the double murder indicate that there are gang connections.
