Traces of radioactive material have been found in Meiji baby formula in Japan, just several days after reports emerged of water leaks at the Fukushima Daiichi nuclear power plant, officials said on Tuesday.

Meiji Co. said the baby formula was found containing radioactive cesium of up to 30.8 becquerels per kilogram (2.2 pounds) after a random sample was taken and examined by the company, the Kyodo news agency reported.

How the baby formula became contaminated was not immediately clear, but company officials believe the crippled Fukushima No. 1 nuclear power plant is directly related. Japan's Health, Labor and Welfare Ministry said such high levels of radioactive materials have not been found since the beginning of the country's nuclear crisis and said it is already planning new limits for food products.