Sensors in Finland, Sweden, and Norway are detecting a radiation spike consistent with some sort of nuclear accident.

The numbers are low, but something has happened:

Nordic authorities say they detected slightly increased levels of radioactivity in northern Europe this month that Dutch officials said may be from a source in western Russia and may “indicate damage to a fuel element in a nuclear power plant.”

But Russian news agency TASS, citing a spokesman with the state nuclear power operator Rosenergoatom., reported that the two nuclear power plans in northwestern Russia haven’t reported any problems.

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The Finnish, Norwegian and Swedish radiation and nuclear safety watchdogs said this week they’ve spotted small amounts of radioactive isotopes harmless to humans and the environment in parts of Finland, southern Scandinavia and the Arctic.

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But the National Institute for Public Health and the Environment in the Netherlands said Friday it analyzed the Nordic data and “these calculations show that the radionuclides (radioactive isotopes) come from the direction of Western Russia.”

“The radionuclides are artificial, that is to say they are man-made. The composition of the nuclides may indicate damage to a fuel element in a nuclear power plant,” the Dutch agency said, adding that ”a specific source location cannot be identified due to the limited number of measurements.”

The levels are low, and the source has not been identified, but it’s 2020, so fasten your seat-belts, we are in for a bumpy ride.