Nuclear Regulation Authority looking for outside help to safely decommission the crippled plant . The International Atomic Energy Agency says new toxic leak expected to be classified a level seven incident . Nuclear Regulation Authority says it `` views this matter seriously '' The warning is the highest since the more than a year earthquake and tsunami triggered a meltdown .
TEPCO looking for outside help to safely decommission the crippled plant . Nuclear Regulation Authority says new toxic leak expected to be classified a level 3 incident . The International Atomic Energy Agency says it `` views this matter seriously '' The warning is the highest since the 2011 earthquake and tsunami triggered a meltdown .