BBC: Radioactive water is leaking from a storage tank at Japan's Fukushima plant, its operator says.
Nuclear plant operator Tokyo Electric Power Company (Tepco) said a worker discovered the leak on Wednesday.
On Tuesday, Tepco also announced that it had found radioactive caesium in ground water around the plant.
The plant was damaged in an earthquake and tsunami in 2011, and has been hit by several leaks and power failures in recent months.
Hundreds of huge water tanks have been constructed...