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".

Swedish police say "about 10 people have been killed" in a shooting at a school for adults in the city of Orebro, but the details remain unclear.

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.

It is the worst school shooting ever to happen in Sweden, where school violence is rare. The suspected gunman is among the dead. Details are still emerging, but this is what we know so far: Police first received reports of a shooting taking place in Orebro,

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