Whats your take on spy Litvinenko's death?

I realise it maybe a dodgy subject to bring up on a forum and if the Webmaster feels its a bit too political or something, I will withdraw it, But i really am curious what other people are thinking about this situation.

As you are probably aware Alexander Litvinenko died last night from “apparent poisoning from a type of Radiation”, Traces of radiation have been found at three locations he had visited, I believe the 2 hospitals and the sushi restaurant he ate in before being taken ill, Police have said the radiation is Polonuim 210 and stated that the risk to the public is low, The Kremlin and Mr Putin deny any involvement and Putin has said “there is no proof death was unatural”.

This is such a odd case and i can not think of any Radiation killings before in Europe, But as to the Russian involvement i feel its a really odd way for a government to kill somebody in such a way when there are many more ways to kill somebody with a lot less fuss and that would not attract such a huge public attention, It also feels a little amateur considering the KGB/FSB’s past and i do wonder if this is not their work,Who else could it be?