China detected low levels of radioactive material iodine-131 in the air above Heilongjiang Province on Saturday and says it was released from a quake-damaged nuclear power plant in Japan, according to China's National Nuclear Emergency Coordination Committee.

The committee said in a statement that no protective measures are needed as levels of the material are below one-hundred-thousandth of the average level.

The committee also reiterated that public health and the environment both remain unaffected by radioactivity released from Japan's crippled Fukushima Daiichi Nuclear Power Plant.

Their conclusion was based on an analysis completed by a Beijing-based emergency response center affiliated with the World Meteorological Organization, the International Atomic Energy Agency, the State Oceanic Administration and the Ministry of Environmental Protection, the statement said.