"An 18-year-old man died during the night", said police spokesman Stephan Soderholm.
One person was killed and five wounded in a shooting in the centre of the southern Swedish city of Malmo on Monday, police said, ruling out a terrorist link.
"Those involved are to be considered as gang-members who are involved in serious organized crime", Sinteus said.
"We didn't see it coming", he added.
Witnesses told newspaper Aftonbladet they heard what sounded like 15 to 20 shots about 6:15 p.m.in the city center.
The motive for the shooting is unknown, police said, and there is no indication it was terror-related. Investigators suggest that automatic weapons were used, and are searching for a dark auto that was seen leaving the scene at high speed, Aftonbladet reports.
Police said there was no cause for public alarm after the incident, the Swedish national news agency reported.
Image: Police are at the scene of the shooting.
Early reports indicate that four people have been shot.