Officials in Toyko say that radiation levels in the city's tap water make the water unfit for babies to drink.

Officials in Toyko say that radiation levels in the city's tap water make the water unfit for babies to drink.

Iodine levels in some areas are twice the recommended safe level.

The authorities have also imposed new restrictions on food from areas affected by leaks from the Fukushima nuclear plant.

The Food and Drug Administration (FDA) in the United States also announced restrictions on certain food imports.

Levels of radioactive iodine-131 in some areas of Tokyo is 210 becquerels per litre; the safe level for infants in 100 becquerels per litre.

People have been warned not to give the water to infants, although there is no immediate health risk to adults.

Workers at the Fukushima reactor 2 have halted work as radiation levels spiked; the UN atomic agency has said radiation is still leaking from the plant.

The confirmed death toll from the earthquake and tsunami is now 9,079, with 12,645 missing.

But the Japanese government now estimates that more than 21,000 people died.