Chief Cabinet Secretary Yukio Edano said on Saturday that radiation levels have exceeded allowable limits in spinach and milk following radioactive leaks at the troubled Fukushima nuclear plant.

The top government spokesman said the tainted milk and spinach was detected in Fukushima and Ibaraki prefectures respectively.

It was the first case of food being contaminated by radiation since the March 11 quake caused radioactive leaks at the Fukushima No. 1 nuclear power plant.