Japan’s prime minister calls for calm
By Khanyisa Tabata
15 March 2011
Japan's prime minister has called for calm after the country's nuclear emergency took a dramatic turn for the worse this morning.
Radiation levels at a nuclear power station spiked to health-threatening levels after a huge explosion hit the Fukushima plant's overheated number two reactor.
Prime Minister Naoto Kan confirmed that authorities are assuming the reactor container has been damaged.
A hydrogen explosion has also occurred at Fukushima number four reactor, following explosions at the first three. Authorities earlier confirmed that the number four reactor, which contains spent fuel rods, had caught fire.