20 August 2013 Last updated at 06:57 ET
The tsunami knocked out cooling systems to the reactors at Fukushima
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Radioactive water has leaked from a storage tank into the ground at Japan’s Fukushima plant, its operator says.
Tokyo Electric Power Company (Tepco) said the leak of at least 300 tonnes of the highly radioactive water was discovered on Monday.
The plant, crippled by the earthquake and tsunami in 2011, has seen a series of water leaks and power failures.
The tsunami knocked out cooling systems to the reactors, three of which melted down.
An employee discovered the leak on Monday morning, Tepco said in a statement.