Russia tells IAEA it is incident-free after nuclear particle increase

Russia has told the U.N. atomic watchdog there have been no nuclear incidents on its territory that could explain elevated but still harmless levels of radioactive particles detected on the Baltic Sea last week, the U.N. agency said on Tuesday.A separate body, the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), which watches for nuclear weapon tests, said on Friday a monitoring station in Sweden had found higher-than-usual levels of caesium-134, caesium-137 and ruthenium-103.