Eskilstuna

Tony Estroem, a salesman from Eskilstuna, about 80km from Orebro, also stopped by the school on Thursday morning.

"It is true that a serious crime is taking place in Eskilstuna," a police spokesperson told TV4.

The violence is now spilling out of troubled suburbs and into other urban areas: last month, a mother and her five-year-old child were injured by gunfire at a playground in the central city of Eskilstuna, and two people were hurt in a shooting at one of Scandinavia's largest shopping malls in Malmö.

Last November it opened its first second hand-only store in a shopping centre in the Swedish city of Eskilstuna.

Daily Svenska Dagbladet, citing a local newspaper report, said a warehouse was being built at a business park outside Eskilstuna, west of Stockholm, along with logistics group Kuehne and Nagel.