Swedish police have said around 10 people have been killed at an adult education centre, in what the country's prime minister said is the worst mass shooting in Sweden's history.
The attack happened at around 12.30pm local time (11.30am UK time) at Campus Risbergska in the town of Orebro, around 200km (125 miles) west of the capital Stockholm.
A spokesperson told a news conference on Tuesday evening that police believe the "primary perpetrator" is dead and acted alone. They do not expect more attacks, the spokesperson added.
Police said they carried out investigations at various addresses in Orebro, with technical personnel working at the scene.
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"At present, the police believe that the perpetrator acted alone, but we cannot rule out more perpetrators connected to the incident," the update on the Swedish police's website said.
Police also said they do not know the motive but do not believe it is terrorism, adding they "had no warning sign" about the attack.
Officers are working to identify the perpetrator and the victims.
The damage at the crime scene was so extensive that investigators were unable to be more definitive on the number killed, said Roberto Eid Forest, head of the local police.
"When it comes to saying anything more about the perpetrator, it is still very early. The operation is ongoing and that will undoubtedly become clearer. But we are working very intensively right now," Mr Forest said.
He described the attack as a "horrible" incident, calling it "exceptional" and a "nightmare".
The suspected gunman had not previously been known to police, Mr Forest said..
Speaking at a press conference this evening, Sweden's prime minister Ulf Kristersson said the tragedy is the worst mass shooting in the country's history.
"Today, we have witnessed brutal, deadly violence against completely innocent people," Mr Kristersson told reporters.
"This is the worst mass shooting in Swedish history. Many questions remain unanswered, and I cannot provide those answers either.
"But the time will come when we will know what happened, how it could occur, and what motives may have been behind it. Let us not speculate," he said.
Meanwhile, the country's king Carl XVI Gustaf said the shooting was a "terrible atrocity".
"We send our condolences tonight to the families and friends of the deceased. Our thoughts at this time also go to the injured and their relatives, as well as to others affected.
"My family and I would like to express our great appreciation for the police, rescue and medical personnel who worked intensively to save and protect human lives on this dark day."
Police earlier urged the public to stay away from the centre as they were searching and evacuating the premises.
At least five people were taken to hospital. Four underwent surgery - one is critically injured, two are stable and one is lightly injured, police said at an earlier news conference.
Swedish newspaper Dagens Nyheter said police officers had been shot at, but police said no officers had been shot.
The centre is for students over the age of 20, according to its website. It offers primary and upper secondary school courses, as well as Swedish classes for immigrants, vocational training and programmes for people with intellectual disabilities.
Google Maps shows a number of schools for children in the vicinity.
The shooting happened after many students had gone home following a national exam.
Students were taking shelter in nearby buildings and other parts of the campus were evacuated.
Teacher Lena Warenmark told SVT News that there were unusually few students on the campus on Tuesday afternoon after the exam. She also told the broadcaster that she heard probably 10 gunshots.
Andreas Sundling, 28, was among those forced to barricade themselves inside the school.
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"We heard three bangs and loud screams," he told the Expressen newspaper while sheltering in a classroom.
"Now we're sitting here waiting to be evacuated from the school. The information we have received is that we should sit and wait."
Swedish newspaper Aftonbladet reported one person trapped in the centre as saying: "We have heard several shots outside."
The newspaper also quoted a person who had received a text from a teacher at the centre saying "there was a shooting with automatic weapons".
It said local emergency and intensive care departments are being made ready for casualties.
Fatal attacks at educational establishments in Sweden are rare, with 10 killed in seven incidents between 2010 and 2022, according to the Swedish National Council for Crime Prevention.
(c) Sky News 2025: Attacker among around 10 killed in shooting at adult education centre in Sweden