EIGHT people have been hospitalised after reports of an unusual smell at the Swedish Security Service headquarters.
About 500 people were evacuated amid fears the smell was related to a gas leak.
The security service has since confirmed that no gas was detected inside or outside the building.
Police are investigating the cause of the alert.
Local media earlier reported that sensors on the building’s roof had detected phosgene – a colourless gas with a suffocating odour, used to make plastics and pesticides.
Phosgene caused a vast majority of deaths during World War One.
Authorities have not confirmed the presence of phosgene.
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