In the low-level buildings of Campus Risbergska in Orebro, a 35-year-old man stalked the corridors looking for his targets.

Swedish police say the shooter who killed 10 people in the country’s worst mass shooting was connected to the adult education center where he opened fire with at least one rifle-like weapon.

A gunman who killed 11 people, including himself, at an adult education centre in central Sweden may have been a student at the school, police said on Thursday, as they described chaotic scenes after the country's deadliest mass shooting as being like an "inferno".

The suspected gunman, who was among the dead, was named in media reports as Rickard Andersson, 35, a former student of the school who lived locally.

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 said at least 10 people were killed at a school on Tuesday, in what has been described as the worst mass shooting in Sweden’s history. The suspected perpetrator also died. The Robertson County Sheriff’s Office is searching for a suspect after police found a body while responding to a welfare check in Greenbrier Tuesday.

Syrians and a Bosnian were among the 10 victims of a gunman who carried out the worst shooting in Swedish history, at a school in Orebro on Tuesday. It was the first information about those murdered in the attack, and it came from two embassies rather than police, who only said there were victims of a number of nationalities.

OREBRO, Sweden (AP) — Sweden’s worst mass shooting left at least 11 people dead, including the gunman, and at least five seriously wounded at an adult education center west of Stockholm. The gunman’s motive hadn’t been determined by early Wednesday as the Scandinavian nation — where gun violence at schools is very rare — reeled from an attack.