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

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

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.