GETTY Swedish firefighters look at smoke after a blaze in Sweden

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Flames began to engulf the OBO housing company, situated within the central Swedish city of Örebro at 10pm GMT (9pm local time), according to SVT. A local reporter from the Swedish newspaper, Nerikes Allehanda received major head injuries after an arsonist threw a large block of ice at his head when he arrived at the scene. Officials have not yet reported any other injuries or fatalities.

Emergency services who reached the scene an hour after the fire broke out reportedly worked for an hour to tame the fire, but officials expressed fears that the inferno would "spread”. Erik Hiding, Örebro duty police officer said: “There is someone who has thrown a burning box on the OBO caretaker’s office. “According to the information I have, it shall burn vigorously. We have units on location.”

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Although the fire has reportedly spread up to the roof of the building, the high-rise housing settlement that is said to be next to the company is yet to be evacuated. Uff Jacobsen, an internal commander at Nerike fire department told STV news site: “We are working hard and right now the fire knocked down, we have great resources in place. “The fire appears to have reached the soffit, there is a risk of spreading to the centre of the plant.”

GETTY Cars were set alight during the unrest in the predominantly immigrant suburb earlier this week