* At 5 pm, the police receive several calls about loud bangs near Vaksala Square in central Uppsala. On the scene, a hair salon, three deceased persons are found. The police later confirm that they were shot to death and are between 15-20 years old.
* Two hours later, at 7 pm, a person is arrested at their residence. The person is detained at midnight.
* The police say early on that it is an "isolated incident" – that it is not connected to the Walpurgis Night celebrations in the city. Initially, they see no connections to any gang conflict – but they are investigating that lead.
* On Wednesday, the Prosecution Authority confirms that a 16-year-old boy has been detained on probable cause suspected of murdering three people. The suspect denies the crime.
* The police and prosecutors do not rule out further arrests connected to the deed.
