It might get worse than suicide bombing, listen to this, I quote myself from a previous post.
"The other thing is that I have just read a part of a Moscow Times article. It states 'Given that a series of deadly attacks, including co-ordinated raids in Ingushetia in June and a string of suicide bombings in Moscow, have failed to affect the Kremlin line, the extremists might opt for attacks of catastrophic proportions in the hope that the greater casualties and psychological shock would cause a capitulation,'
'In a clear recognition of this threat, the Federal Nuclear Power Agency announced Wednesday (September 1) that security has been boosted at nuclear power plants and other nuclear facilities across Russia. During Russia's first military campaign in Chechnya in 1994-96, the Chechen rebels acquired radioactive materials, threatened to attack nuclear facilities, plotted to hijack a nuclear submarine, and attempted to put pressure on the Russian leadership by planting a container with radioactive materials in Moscow and threatening to detonate it.
'Russia's second campaign, which began in the fall of 1999, has already seen Chechen-based radical separatists plant explosives in tanks filled with chemical substances, scout nuclear facilities and establish contacts with an insider at a nuclear power plant,' the article concludes."