Japan earthquake: Explosion at Japanese nuclear plant
A massive explosion has struck a Japanese nuclear power plant after Friday's earthquake.
Pictures show a blast at the Fukushima plant and reports say several workers were injured.
Japanese officials fear a meltdown at one of the plant's reactors after radioactive material was detected outside it.
A huge relief operation is under way after the 8.9-magnitude earthquake and tsunami, which killed more than 600.
Humphrey Hawksley reports.
12 Mar 2011