What has happened?
At 01:00 on the night before Midsummer's Day, a man started shooting at people on a pub street in central Oslo.
Two people were killed and 21 were injured.
Several of those hit by the bullets were at the gay bar London pub and during the weekend Pride was to be celebrated in several places in Oslo.
However, the two who died were at the neighboring bar Per on the Corner.
The next morning, the police announce that they are investigating the shooting as a terrorist crime.
All events linked to Pride are canceled.
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See photos from the event.
Photo: Two dead and several injured after shooting in Oslo
Who is the designated perpetrator?
42-year-old Zaniar Matapour is believed to have carried out the suspected terrorist act.
With the help of passers-by, he was arrested by the police at 01.19, five minutes after the first alarm was received.
In the morning, he was arrested for murder, attempted murder and terrorism.
Matapour is a Norwegian citizen and lives in Oslo.
He came to Norway from Iran as a 12-year-old and has been known to the police since 2015. This is due to his connections to an extremely Islamist network in Norway.
The police must have had contact with him by May, but without receiving indications that he was planning any violent action.
In 1999, Matapour was sentenced to prison for a knife attack on a nightclub.
According to NRK, the court then took into account his "obvious mental problems".
Other legal documents show that the man may suffer from paranoid schizophrenia and depression.
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The suspected perpetrator is already known to the Norwegian security police.
Photo: TT / NRK
What have the reactions been like?
- We know neither the goal nor the motive for this act, but it has been perceived as an attack on gay people precisely because it happened during Pride and because many of the injured were injured at the gay bar, says SVT's reporter on site Ida Linde.
She says that the city has commuted from grief and shock to determination to take back the streets and venture out.
- I feel a sadness that I have not felt before, Pride has always been a big part of my life, says Thomas Kristiansen who was on the bar street the next day to show his support.
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THE DEED IN OSLO: Worked in the pub when the perpetrator started shooting
How does this affect the celebration of pride?
Oslo's big pride parade has been canceled, but spontaneous demonstrations have been held over the weekend.
However, it is not clear if hate crime motives are behind the act.
On Monday evening, various LGBTQ organizations plan to carry out a demonstration on Rådhustorget in Oslo, but the police advise people not to attend as they cannot guarantee security.
In a press release, the Norwegian police announced that the security police PST and the work of the ordinary police during the act will be examined.
- Given the seriousness of the case, it is very important that lessons learned and any weaknesses are identified quickly in order to be able to implement measures, says Police Director Benedicte Bjørnland in the press release.
The country's police authority and security service are now being examined after the mass shooting in Oslo.
"I have confidence that PST does a good job based on the resources and opportunities they have", says Norway's Minister of Justice Emilie Enger Mehl (Sp).
Photo: Javad M. Parsa / NTB / TT