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.

Swedish Police have confirmed they are not ruling out the possibility that the mass school shooting was racially motivated as it emerged that the 10 people killed are of multiple nationalities. When asked if they have ruled out the possibility the attack was racially motivated,

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.

Police say 10 people have been killed in a shooting at an education centre in central Sweden, including the suspected gunman. Prime Minister Ulf Kristersson described Tuesday's attack at Risbergska school in Orebro, 200km (124 miles) west of the capital city Stockholm, as the "worst mass shooting in Swedish history".

Sweden’s prime minister said the attack at the Risbergska School was the worst mass shooting in country’s history

Orebro, Sweden – Police confirmed that 11 people, including the suspected gunman, were killed in a shooting at Risbergska school, an adult education centre in Orebro, on February 4. Prime Minister Ulf Kristersson described the attack, 200km west of Stockholm, as the "worst mass shooting in Swedish history."

One day after the killings at an adult educational center, some gathered to lay flowers and come to grips with the violence.

Sweden's King Carl XVI Gustaf, Queen Silvia and Swedish Prime Minister Ulf Kristersson visited an education center where at least 10 were killed.

Here's what we know so far. The suspect was unknown to police and they believe he acted alone. Officers said he had no links to gangs and is thought to have acted "without any ideological motive". They also do not believe the attack was motivated by terrorism.