Sweden is reeling from the country's deadliest mass shooting this week as investigators continue to look into the gunman's motive.

Shooter responsible for Sweden's deadliest mass shooting earlier this week was linked to the adult education center where he opened fire, using at least one rifle-like weapon, according to law enforcement officials on Thursday.

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.