Workers at the Fukushima nuclear plant in Japan have restarted efforts to restore electrical power and cool the overheated reactors.
The work was stopped after smoke and steam was seen coming from two of the reactors.
The plant was badly damaged in the earthquake and tsunami on 11 March.
Away from the plant, evidence of radiation in vegetables, water and milk has led to concern within Japan and abroad, despite official assurances that the levels were not dangerous.
The World Health Organisation is monitoring the situation regarding food radiation levels closely.
WHO spokesman Gregory Haertl said the potential risk to health was being taken seriously, but there was no undue cause for alarm at this stage.
Meanwhile, as work progresses at the plant, power cables are reported to have been reattached to all six reactors.
However authorities say they are not in a position to get enough power to them to restart cooling systems and monitoring equipment.
More than 170,000 people have been moved out of the zone since the quake and tsunami struck.
At a news briefing, Japan's Chief Cabinet Secretary Yukio Edano said there was no need to expand the 20km radius evacuation area at the moment.
The International Atomic Agency warned that the situation was still ‘very serious’, but it also expressed confidence that the crisis would be resolved.
The Japanese government has renewed an invitation to main opposition to form a grand coalition to deal with the disaster, but the opposition continues to rejects it.
A World Bank report has predicted that the earthquake and tsunami will depress growth briefly before reconstruction kicks off and gives the Japanese beleaguered economy a boost.
