German police test four for radiation

The former wife of a Russian businessman in the focus of investigations surrounding the fatal poisoning of ex-spy Alexander Litvinenko, along with three relatives, are being tested for radiation contamination, German police said today.

Investigators have found traces of polonium-210, the rare radioactive substance that killed Mr Litvinenko, in at least two locations that businessman Dmitry Kovtun visited during a four-day stay in Hamburg before he met Mr Litvinenko in London on November 1.