China has detected low levels of radioactive iodine in the atmosphere of northeastern Heilongjiang province although this doesn’t pose a threat to public health, the official Xinhua news agency said today, citing the Center for Disease Control and Prevention.

The discovery is a sign that some radioactive material released from the Fukushima Dai-Ichi nuclear plant in Japan has reached China, Xinhua cited a statement from the center as saying. Chinese authorities are monitoring the situation to determine whether the leak from the plant that was damaged in the March 11 earthquake will affect the country, according to the statement.