Japan's Nuclear and Industrial Safety Agency on Tuesday said radioactive water from the damaged Fukushima Daiichi nuclear power plant had not been confirmed to have leaked into the Pacific Ocean from the plant's underground drainage system. The agency maintained that water levels at the channels located between 50 and 70 metres from the shore have remained consistent. Tokyo Electric Power Company operator of the radiation- leaking plant said they have taken preventative measures to ensure water doesn't flow from the plant into the sea. According to the nuclear safety agency, the utility firm has protected the drainage system with concrete blocks and sandbags. Tuesday's announcement and preventative measures come after high levels of radiation were detected in a drainage system and damaged reactor buildings whose structural integrity and key cooling functions were compromised by the March 11 earthquake and tsunami.Meanwhile, the National Police Agency of Japan said the catastrophic earthquake and ensuing tsunami have left 11,082 people dead and 16,717 others unaccounted for in the country.