He has been requested to be detained on three counts of attempted murder and on an aggravated weapons offense, prosecutor Gabriella Widstrand tells TT.
The gunshot alarm was received at 10:30 a.m. on Saturday. At the scene, police found that three people, two men and a woman, had been shot. One man was seriously injured.
He should be awake and in a stable condition, says Gabriella Widstrand.
The suspected perpetrator was arrested in the area shortly afterwards.
According to police, the shooting was an isolated incident linked to some kind of conflict, but Widstrand does not yet want to comment on the circumstances.
The detention hearing will take place tomorrow, Tuesday.
