NEW : There is no immediate health hazard , experts tell local officials . Local government cordons off an area in the Setagaya ward . Radiation there is higher than around Fukushima . Radiation experts are now checking what contaminated the bottles , a Setagaya ward official told CNN , declining to be named in line with policy . The Japanese government has ordered all schools to be closed for a week and residents are being told not to go outside unless absolutely necessary.
NEW : There is no immediate health hazard , experts tell local officials . Local government cordons off an area in the Setagaya ward . Radiation there is higher than around Fukushima . The Japanese government has ordered all schools to be closed for a week and residents are being told not to go outside unless absolutely necessary.