Seawater near Japan's quake-hit Fukushima Daiichi nuclear plant has a much higher level of radiation than previously reported, officials say. In one section, radioactive iodine stood at 3,355 times the legal limit, said Japan's nuclear safety agency. However, an official said the iodine would have deteriorated considerably by the time it reached people. Meanwhile, the president of the Fukushima nuclear plant operator Tepco has been admitted to hospital. Masataka Shimizu is being treated for high blood pressure and dizziness, a Tepco spokesperson said. Mr Shimizu has barely been seen in public since the earthquake and tsunami on 11 March which damaged the Fukushima plant. Engineers are battling to restore power and restart the cooling systems at the plant. Tepco has been accused of a lack of transparency and failing to provide information more promptly. It was also heavily criticised for issuing erroneous radiation readings at the weekend.