Akhir 10, 1432, March 15, 2011, SPA -- Spent fuel rods containing radioactive material may have burned in Tuesday's fire at the Fukushima Daiichi nuclear plant -- causing a spike in radiation levels, the plant's owner said. The blaze started Tuesday morning but was later extinguished, Tokyo Electric Power Company was quoted as saying by CNN. Chief Cabinet Secretary Yukio Edano said Tuesday afternoon that radiation readings at the plant's front gate had returned to a level that would not cause "harm to human health."