Japan’s nuclear safety agency says a fire in a reactor at a crippled nuclear power plant in tsunami-ravaged north-eastern Japan has been extinguished.

The fire broke out Tuesday at the Fukushima Daiichii nuclear plant in one of the hardest-hit provinces in last week’s massive earthquake and tsunami.

Meanwhile, radiation was spewing from the Daiichii plant in a dramatic escalation of the 4-day-old catastrophe, forcing the government to tell people nearby to stay indoors to avoid exposure.

In a nationally televised statement, Prime Minister Naoto Kan said radiation had spread from four reactors and told people living within 30 km of the Daiichii complex to stay indoors to avoid radiation sickness.

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