The United States is not expected to experience harmful levels of radioactivity from Japan' s damaged earthquake-hit nuclear power reactors, the U.S. Nuclear Regulatory Commission (NRC) said Sunday in a statement.

"All the available information indicates weather conditions have taken the small releases from the Fukushima reactors out to sea away from the population," the NRC said. "Given the thousands of miles between the two countries, Hawaii, Alaska, the U.S. Territories and the U.S. West Coast are not expected to experience any harmful levels of radioactivity."

The NRC is coordinating with the Department of Energy and other federal agencies in providing whatever assistance the Japanese government requests as they respond to conditions at several nuclear power plant sites following the March 11 earthquake and tsunami. The NRC has sent two boiling-water reactor experts to Japan as part of a U.S. Agency for International Development team.

On Friday, a massive 9-magnitude earthquake struck off the east coast of Japan's main Honshu Island, which had triggered huge tsunami along Japan's Pacific coast and caused hundreds of deaths and catastrophic damage.