A Tory minister has warned Vladimir Putin that "all options are on the table" if Russian forces are found to have used chemical weapons in an assault on the Ukrainian port of Mariupol.
Armed forces minister James Heappey said the use of chemical weapons was "beyond the pale" and if the reports were accurate there would be a response from the UK and its allies.
Officials from the West are examining claims that a chemical agent was used by Russian forces in a drone attack on the besieged city.
