THIS is the chilling moment a Swedish school shooter prowls around the corridors as kids are left screaming and running for their lives.
At least 11 people are believed to have been killed after the lone gunman opened fire at Campus Risbergska School in Orebro, according to cops.
The number of those injured in the horror attack are still unclear but 11 have now been confirmed dead, cops told Aftonbladet.
Police are now working to identify the victims and inform their families.
The deadly shooting caused such extensive damage that investigators are struggling to confirm an exact death toll, Police chief Roberto Eid Forest said.
Sweden's Prime Minister Ulf Kristersson described it as the "worst mass shooting in Swedish history".
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He said: "Today, we have witnessed brutal, deadly violence against completely innocent people.
"This is the worst mass shooting in Swedish history. Many questions remain unanswered, and I cannot provide those answers either."
So far, six people have been rushed to hospital with one in a serious condition, regional officials confirmed.
Shocking footage showed several people appearing to be exiting the adult education center to the sound of gunshots.
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Loud screams were heard as they rushed past a children's playground.
In a separate clip, terrified students appeared to be barricaded in classrooms as alarms blared in the background.
The horrifying video saw people sat quietly in a classroom while the warning sound rang behind them.
Armed officers stormed the school with weapons drawn, while ambulances and rescue services swarmed the area.
Police rushed to the scene around 12.30pm on Tuesday following reports of an attacker firing an automatic weapon, and a major emergency response was launched.
The shooter turned the gun on himself at the scene before he could be stopped, police chief Roberto Eid Forest added.
Cops are now working to identify him but don't believe he had any terror motive at this moment and say he worked alone.
He also wasn't previously known to police, officials said.
Orebro Police continued: "This is currently seen as attempted murder, arson and aggravated weapons offence."
It is understood that the suspect may be a 35-year-old man, reports .
Cops did not mention any age during their press conference.
A huge police operation was launched after gunfire was reported at 12.33pm on Tuesday.
Ambulances, rescue services and police quickly moved onsite while they placed a lockdown on the education centre and circled the grounds.
The school typically caters for students over the age of 20, according to its website.
They also offer classes for children of primary and upper secondary school ages.
It is located around 200km west of Stockholm.
During the shooting, a person who knows a teacher at the school received a gut-wrenching text message from his friend.
They said: "He wrote that there was automatic weapon shooting at the school and that they had taken shelter in a room.
"Then he wrote that he loved me."
A teacher at the school, Lena Warenmark, told Swedish broadcaster SVT: "We heard gunshots very close to our study. There were probably ten shots."
Local residents have been urged to stay away from the site as police continue their operation.
A police statement said: "The public is urged to stay away from the Västhaga area, alternatively stay indoors in their homes or go the other way.
"Listen to the police officers at the scene.
"The operation concerns threats of deadly violence. The operation is still ongoing."
Sweden's justice minister Gunnar Strömmer described the shocking incident as "very serious", according to .
The school's headteacher, Mattias Molin, said many of the people have been evacuated and sheltered in nearby buildings.
Molin added: "I don't know much more than that. We don't know anything yet."
Students at nearby schools have been kept indoors "for security purposes".
This school primarily serves students who have not finished primary or secondary school.
The centre also offers Swedish classes for immigrants, vocational training, and programs for people with intellectual disabilities
A witness, Magnus Håkansson, shared his terrifying experience at the crime site, according to .
He said: "I heard bangs and then I came out quite early after that.
"The police ordered me to lie down at the scene. I saw a lot of blood."
Swedish Prime Minister Ulf Kristersson has since commented on the horror attacks, saying: "It is with sadness that I have received information about the terrible act of violence in Örebro.
"My thoughts are with those who have been affected and their relatives."
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"It is a very painful day for all of Sweden. My thoughts are also with all those whose normal school day was replaced with terror.
"Being confined to a classroom with fear for your own life is a nightmare that no one should have to experience."