Akhir 12, 1432 H/March 17, 2011, SPA -- A senior official of the U.N. nuclear agency said that the situation in and around the tsunami-stricken Japanese nuclear plant remains «very serious» but relatively stable, according to AP. Graham Andrew added «there has been no significant worsening» over the past 24 hours at the crippled Fukushima Dai-ichi nuclear plant. Graham is a senior aide to International Atomic Energy Agency chief Yukiya Amano. He spoke to reporters Thursday shortly after Amano flew to Tokyo to assess efforts to fight the nuclear crisis unleashed by the massive earthquake and tsunami that hit Japan's northeastern coast Friday.