France clinical trial: 'No known antidote' to drug

One man is brain-dead and another five people are in hospital after an experimental drug was administered to 90 people in a French clinical trial.

Earlier reports that the drug was a cannabis-based painkiller have been denied by the health ministry.

The chief neuroscientist, Professor Pierre-Gilles Edan, gave an update on the condition of those affected.

Fergus Walsh reports.