At least six people – four women and two men – were wounded in the mass shooting in Sweden and required hospital treatment, according to officials.

Five of the six required surgery for gunshot wounds and remained in a serious but stable condition, regional authorities said.

Another woman was treated for minor injuries, BBC News reported.

Full details around the exact number of those dead and wounded in the attack have not been confirmed by police.

Campus Risbergska caters to students over the age of 20, according to its website.

The institution provides primary and upper secondary education, Swedish language courses for immigrants, vocational training, and specialised programmes for individuals with intellectual disabilities.

A significant number of students in Sweden’s adult education system are immigrants aiming to enhance their academic qualifications and obtain degrees that improve their employment prospects while also learning Swedish.

Authorities have not released details regarding the identities or ages of the victims, nor have they confirmed whether those killed were students or staff members.

Pope Francis said he was “deeply saddened” by the deadly mass shooting in a Swedish school.

Mourning the victims of the deadly mass shooting, he sent “assurance of his spiritual closeness to all affected by this traumatic incident”.

The pontiff “offers prayers for the repose of the souls of those who have died,” as well as “consolation of their grieving families and friends, and for the speedy recovery of the injured” in the 4 February attack, read a 5 February telegram signed by Vatican’s secretary of state, Cardinal Pietro Parolin.

The murder suspect had Asperger’s and high-functioning autism, and had major problems at school, according to Sweden’s TV4.

“From the spring semester of grade eight and throughout grade nine, he failed all subjects. He was therefore not eligible for upper secondary school and had to follow an individual program,” the channel reported.

“Rickard Andersson studied at Wadköping Education Center in Örebro. There he attended a special class for people with Asperger’s and high-functioning autism, and he received mixed grades.

“He passed in aesthetic activities and history, but failed in all other subjects.

“Rickard Andersson also did not do military service, as his lack of high school grades meant that he was never called up for military service.”

The Swedish flag was flown at half-mast.

The morning after the attack, Orebro was still in shock over the worst mass murder in Swedish history.

“That it could happen in Orebro, that was totally unexpected,” mayor John Johansson told broadcaster SVT.

“I understand that children, our youth, are very afraid today. So am I.”

Police said they did not see any general threat against schools or pre-schools in the country, nor against adult education schools, including Swedish classes for immigrants.

Sweden has been struggling with a wave of shootings and bombings caused by an endemic gang crime problem that has seen the country of 10 million people record by far the highest per capita rate of gun violence in the European Union in recent years.

However, fatal attacks at schools are rare.

Ten people were killed in seven incidents of deadly violence at schools between 2010 and 2022, according to the Swedish National Council for Crime Prevention.

King Carl XVI Gustaf and Queen Silvia visited the school campus in Orebro and attended a memorial service at the St Nikolai church as they mourned the massacre.

“A grieving process is hard to do alone,” the king said as he laid white flowers at a memorial site with candles near the school.

“I think all of Sweden feels it has experienced this traumatic event.”

The royal couple were joined by prime minister Ulf Kristersson. “February 4 will forever mark a dark day in Swedish history,” Mr Kristersson said in a statement. “We are a country in mourning and we must all come together.

“Together, we must help the injured and their relatives bear the grief and weight of this day.”

Candles and flowers have been placed near the single-storey school in Haga Street, where police officers continued their investigations.

Flags were also flying at half-mast in Orebro, as well as at parliament and the royal palace in Stockholm.

Survivors of Sweden’s worst mass shooting on Wednesday recalled trying to save the lives of their fellow students at a school for adults in Orebro, a day after a gunman killed 10 people.

Some students were in class, while others were having lunch when the gunman, identified as Rickard Andersson, began firing at around 12.30pm on Tuesday.

“A guy next to me was shot in the shoulder. He was bleeding a lot. When I looked behind me I saw three people on the floor bleeding. Everyone was shocked. They said: ‘Go out! Get out!’,” a student named Marwa told broadcaster TV4.

“I took my friend’s shawl and tied it tightly around his shoulder so that he wouldn’t bleed so much.”

Hellen Werme, 35, a nursing student, said that after hearing shots she had hidden under a bed to evade the gunman.

“The teacher shouted for us to lock the door and get down on the floor,” the mother-of-two told Reuters. “I thought that this was my last time, my last day. That I’m getting shot today.”

Ms Werme said she still had not been able to get in touch with five of her classmates who were in a different part of the school when the shooting occurred.

“I never want to go back there,” she said.

A Kurdish teenager who attends the school next to the adult learning centre where 10 people were shot dead says he fears there was a racial element to the killings.

“In this school, it’s only newcomers to Sweden. There’s not so many Swedish people. So, I think it was targeted for one special group of people,” Ismail Moradi, 16, told the BBC.

“I was shocked and didn’t know if I wanted to come to school today after what happened so nearby,” he said.

Six police officers were treated for smoke inhalation following the shooting.

Authorities are investigating whether arson was involved but will not yet confirm where the smoke came from.

The fire alarm was triggered, and police believe there was no regular fire.