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 gunman who killed 10 people in Sweden's deadliest mass shooting appears to have shot himself, police have claimed. Swedish media identified the attacker as Rickard Andersson, 35, who carried out the attack at an adult education centre on Tuesday.