On Friday, a person who was later arrested, reasonably suspected of attempted murder, was arrested.
Now the police are revealing more details about the investigation.
The detained man was arrested at Arlanda when he tried to get out of the country.
The police have also found a getaway car that is seized and they will now carry out a technical inspection of the vehicle.
At the same time, the police suspect that another perpetrator may be involved in the shooting.
However, the person is unknown and thus not arrested at the moment, according to UNT.
Looking for observations
To move forward with the investigation, the police are now appealing for tips.
Observations are mainly requested from Johannesbäcksgatan around 11 pm on Wednesday evening, 20 April.
- We urge the public to get in touch, says police spokesman Jonas Eronen.
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See SVT's reporter on site in Sala Backe where the shooting took place.
Photo: Emergency call Uppsala / SVT