Badly wounded, Salim Karim Iskef managed to video-call his fiancée to say he loved her one last time before he died in Sweden's deadliest mass shooting.

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.

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."

A gunman opened fire at an adult education center in the Swedish city of Örebro on Tuesday, killing at least 10 people in what the country’s prime minister called the “worst mass shooting in Swedish history.

The shooter targeted a center that serves migrants seeking to integrate into a country that had already reversed its liberal migration policies.

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

Sweden’s right-wing government said on Friday it would seek to tighten gun laws in the wake of the country’s deadliest mass shooting at an adult education center where the attacker appeared to have used several of his own licensed rifles.

The police responding to the attack encountered firing so intense that they struggled to tell how many gunmen were on the scene, an official said.

Police say around 10 people have died in a shooting at an education campus in the city of Orebro. It is the worst school shooting ever to happen in Sweden, where school violence is rare. The suspected gunman is believed to be among the dead.

Sweden is set to tighten its gun laws, including a ban on certain semiautomatic weapons, after a mass shooting that left 11 people dead.

Sweden's worst ever mass shooting this week has raised questions about the country's gun laws and widespread gun ownership.