Residents of an evacuation zone within 20 km of the crippled Fukushima No. 1 nuclear power plant may be allowed to stay at their homes overnight for three months starting April 26, government sources said Sunday.

At the end of December, 330 residents of 152 households in the village of Kawauchi in Fukushima Prefecture were still living in temporary housing since the power plant was tipped into meltdown by the earthquake and tsunami of March 11, 2011.

They are currently allowed to visit their homes only in the daytime.