Moscow, Russia (CNN) The Norwegian Radiation and Nuclear Safety Authority on Thursday said "tiny amounts of radioactive iodine" had been detected at an air-filter station, one week after a mystery-shrouded explosion at a Russian military test range.

"Tiny amounts of radioactive iodine [have] been measured in air at our air filter station in Svanhovd in Northern Norway," the statement read." The level detected is very low and poses no harm to people nor the environment."

The statement added that the sample was taken during the period of 9-12 August.

It comes after a missile test went awry at a test range in northern Russia , killing at least five nuclear specialists on August 8.

Rosgidromet, the Russian meteorological agency, reported that radiation levels in the vicinity spiked four to 16 times higher than normal background levels.

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