A 17-year-old boy is also being sought for the murder of a 15-year-old boy in Rosengård in Malmö on Wednesday, as is a 35-year-old man suspected of being an accessory.
The shooting took place in the Rosengård district of Malmö at around 6:30 p.m. on Wednesday.
The boy was taken to hospital by ambulance but his life could not be saved.
The two teenage murder suspects were arrested shortly after the shootings.
The murder in Stockholm was committed at the Vårbyparken football field just before 5 p.m. on Monday. The victim was a teenage boy aged 17-18.
On Friday, three separate detention hearings will be held in the case at Malmö District Court.
