Sweden has already started to prepare for a similar future wave from Ukraine.
- Many weapons of war can be absorbed by criminals, says the police's gang expert, Gunnar Appelgren.
At the same time that shootings are increasing in Sweden, the smugglers are making a lot of money by supplying weapons to gang criminals.
Now the police believe that Ukraine may become a new smuggling center.
30 years after the war in the former Yugoslavia, several countries are still struggling to stop the military weapons era used in the 90s.
In the clip: Hear more about the police's concerns about how the war in Ukraine could benefit the Swedish gangs in the future.