Small amounts of radioactive isotopes have been detected in air samples collected in Kotka in south-east Finland, but there is no risk to humans and similar discoveries are "quite normal", the country's nuclear safety watchdog said on Wednesday.
"The observed radioactivity has no impact on the environment or human health, as the concentrations were very low," the Radiation and Nuclear Safety Authority (STUK) said in a statement.
Finland, Sweden, Russia and the wider region have a number of nuclear power reactors.
