Police search for radio-active material.

Police probing the death of the Russian ex-spy Alexander Litvinenko have called in experts to search for radioactive material, the Home Office has said.

Mr Litvinenko's death, in a London hospital on Thursday, is believed to be linked to the presence of a radioactive substance in his body, it said.

The Metropolitan Police are said to be looking for any residual material at a number of locations.

One word pops instantly to mind - S*!T