UN starts Europe radiation probe
The UN nuclear agency has reported "very low" - but higher than usual - levels of radiation in the Czech Republic and elsewhere in Europe.
The International Atomic Energy Agency (IAEA) said the "very low levels of iodine-131 have been measured in the atmosphere over the Czech Republic" and elsewhere on the continent.
Its statement said the current levels do not seem to pose a public health risk.
The IAEA said the cause is not known, but it is not the result of Japan's Fukushima Daiichi nuclear disaster, which spread radiation across the world in March.
The agency said the radioisotope will lose much of its radiation in about eight days and that the agency is investigating.