There has been an explosion at a Japanese nuclear power plant that was hit by Friday's devastating earthquake. Pictures show a blast at the Fukushima plant and initial reports say several workers were injured. Nuclear expert, Malcolm Grimston told the BBC that nuclear materials may have been able to escape.
![Footage of blast at Japan nuclear power plant](https://cdn-ak-scissors.b.st-hatena.com/image/square/20db0cba461d60e570bcd8f4288dc81d63dfcf53/height=288;version=1;width=512/https%3A%2F%2Fichef.bbci.co.uk%2Fnews%2F1024%2Fmedia%2Fimages%2F51647000%2Fjpg%2F_51647556_jex_984081_de55-1.jpg)