In Monday, a woman was shot dead in a residential building and a man was injured.
On Wednesday, two people were arrested in the Stockholm area, suspected of murder and attempted murder. Both had been detained in their absence.
The swift arrests are due to the police's thorough investigative work, says prosecutor Marika Jönsson to SVT Småland.
One of the suspects, a man in his 30s, denies the crime, says the man's lawyer Fredrik Sund to Smålandsposten.
TT has sought the other suspect's defender.
The alarm about the shooting came to the police via SOS from a residential building in the Teleborg district of Växjö on Monday evening. The incident is being investigated as murder and attempted murder. So far, the police and prosecutor have not commented on a possible motive behind the shooting.