Radiation at a tank holding highly contaminated water at Japan's crippled Fukushima nuclear plant has spiked 18-fold, the plant's operator has said.
Radiation of 1,800 millisieverts per hour - enough to kill an exposed person in four hours - was detected near the bottom of one storage tank on Saturday, Tokyo Electric Power Co , also known as Tepco, said.
A Tepco spokesman also said a new leak had been detected from a pipe connecting two other tanks.
The Fukushima plant was destroyed by a tsunami in March 2011 in the worst nuclear disaster since Chernobyl a quarter of a century earlier.
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