Japan reports emergency at second nuclear reactor (unit 3 at the same plant)

TOKYO – Japan's nuclear safety agency is reporting an emergency at a second reactor in the same complex where an explosion had occurred earlier. The Nuclear and Industrial Safety Agency said early Sunday that the cooling system malfunctioned at Unit 3 of the Fukushima Dai-ichi nuclear plant. The agency said it was informed of the emergency by Tokyo Electric, the utility which runs the plant. No further details of the troubles at Unit 3 were immediately available. An explosion occurred at another reactor in the complex on Saturday, destroying the building housing the reactor and handing authorities an urgent complication...