Weather reports say winds are blowing
radiation from the plant, on Japan's north-east coast,
over the Pacific.
Friday's 9.0-magnitude quake and tsunami
devastated Japan's north-east coast, with more than
3,000 confirmed dead and thousands missing.
Officials have warned people within
20-30km of the nuclear plant to either leave the area or
Japan has also announced a 30-km no-fly
zone around the site to prevent planes spreading the
radiation further afield.
ut thousands of people are missing and it
is feared at least 10,000 may have been killed.
More than 500,000 people have been made
The government has deployed 100,000
troops to lead the aid effort.
The crisis at the Fukushima plant - which
contains six nuclear reactors - has mounted since the
earthquake knocked out the cooling systems.
Explosions rocked the buildings housing
reactors one and three on Saturday and Monday.
On Tuesday morning a third blast hit
reactor two's building. A fire also broke out at a spent
fuel storage pond at the power plant's reactor four.