Ukrainian officials are to re-open a criminal investigation into opposition leader Viktor Yushchenko's mystery illness after doctors in Vienna yesterday confirmed it was caused by poisoning.
The doctors said that extensive tests showed a form of dioxin had been used, leaving Mr Yushchenko's face disfigured.
Mr Yushchenko was taken ill in September as he campaigned in the run-up to the disputed presidential elections that have now been declared invalid because of irregularities.
The presidential poll is set to be re-run on 26 December.
