Despite alarming new radiation data presented by the International Atomic Energy Agency, the government said Thursday it has no plans to widen the evacuation zone around the crippled Fukushima No. 1 power plant.

The international nuclear watchdog said Wednesday in Geneva it detected about 2 million becquerels of radioactive substances per sq. meter, or double the threshold at which the IAEA itself would order an evacuation, in soil samples from the village of Iitate about 40 km northwest of the nuclear power plant.

With the data, the IAEA effectively urged Japan to expand the current no-go zone of 20 km around the plant. Residents in areas 20 km to 30 km of the plant have been advised to stay indoors.