The suspect, who is in his forties, is appearing at Varberg District court, following the violence which started at a large house on the Onsala peninsula on Saturday night.
Swedish media widely reported that he stabbed an old friend to death during a dinner party inside the property, before moving on to attack several other people at different homes in the residential area, just south of Kungsbacka in Halland.
Two of the victims – understood to be a couple – were seriously injured, allegedly after being hit with an axe.
Police told the TT news agency ahead of the hearing on Tuesday that it remained unclear what had triggered the outbreak of violence, but would not go into any more detail about their investigation.
However, regional newspaper Kungsbacka-Posten reported that a source close to the case understands that the suspect thought he was being followed and that his house had been bugged. The paper also describes the man as “burnt out” and said he had sought psychiatric help in the days before the attacks.
Onsala is a wealthy area 45km south of Gothenburg and is home to more than 11,000 residents.
The pre-trial court hearing is scheduled to take place on Tuesday afternoon.