Shores are submerged in Natori city, Miyagi prefecture (state), Japan, after a ferocious tsunami spawned by one of the largest earthquakes ever recorded, slammed Japan's eastern coasts Friday, March 11, 2011. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, FOR COMMERCIAL USE ONLY IN NORTH AMERICA
More than 180,000 people have been evacuated from the area around a Japanese nuclear plant where a partial meltdown may have occurred.
Officials are offering limited and sometimes conflicting information.
One official says the core in one reactor has partially melted, despite frantic efforts to keep it cool.
Authorities at the Fukushima plant have resorted to using sea water
to cool a two reactors in an attempt to prevent meltdowns.
Several reactors are in danger of overheating after Friday's earthquake knocked out power.
The U.N. nuclear agency says authorities have declared a state of emergency at a second plant.
It says higher-than-permitted levels of radioactivity have been measured at the Onagawa power plant and the source is being investigated.
All three reactors at the plant are said to be under control.
Meanwhile, a Japanese utility report that one of two pumps in the cooling system at a third nuclear plant has failed.
Japan Atomic Power says the reactor is operating normally on the one
pump, and there's no risk of a radiation leak.
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