While the police say they have not yet identified a motive for Sweden’s worst mass shooting, Reham is alarmed that the man police believe to be the perpetrator attacked a school where Swedish for Immigrants (SFI) courses are taught.

Around 10 people were killed in a school shooting in Örebro. The damage at the crime scene was so extensive that investigators were unable to be more definitive, said Roberto Eid Forest, head of the local police.

The attack on Tuesday - described by Sweden's prime minister as the "worst mass shooting" in the country's history - happened at a school for adults.

Around 10 people have been killed in a shooting at an adult education centre in Sweden, police say. More details are emerging of the attack, with the scene described as a "nightmare". Follow the latest.

The king and queen visited the scene of the tragic event that occurred on Tuesday and Swedish flags were flown at half-mast to honor the victims.

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Officials in Sweden have vowed to determine why a man killed 10 people, and apparently himself, in an unprecedented attack that's shaken their "society to its core."

"It is a very painful day for all of Sweden," Prime Minister Ulf Kristersson said in a statement posted on social media.