Cooling systems have been restored for four fuel storage pools at Japan's tsunami-damaged nuclear plant, more than a day after a power cut halted the supply of water.
Tokyo Electric Power said the cooling system at the last pool at the Fukushima Dai-ichi plant was repaired early on Tuesday. It added that pool temperatures were well within safe levels and the reactors were unaffected.
The company said workers were still trying to determine the cause of the cut, which began when a brief power failure hit the plant.
A massive earthquake and tsunami two years ago caused extensive damage to the plant.