>> Moscow has called a special meeting of the world's chemical weapons watchdog. President Vladimir Putin hopes it can diffuse the diplomatic dispute triggered by the poisoning of a former Russian double agent on British soil. The organization for the prohibition of chemical weapons will hold a special session at the Hague on Wednesday.
> We have presented at least 20 questions for discussion, and I hope through this discussion a final full stop can be put on what has happened.>> Sergei and his daughter Yulia were poisoned with a nerve agent, identified as Novichok in the English city of Salisbury last month.
Sergei remains in a critical condition, but Yulia is recovering. The cases plunged east west relations to their lowest point since the Cold War, with the UK and its allies expelling around 130 Russia diplomats, and Moscow responding in kind. But on Tuesday the head of British Military Research Center Porton Down said, it had so far been unable to tell whether the nerve agent used in the Skripal attack was produced in Russia.
>> We are a 100% certain that this is from the Novichok family of nerve agents, a military grade nerve agent. It's not for us to advise on who made the nerve agent or where indeed it came from.>> He added that only a state actor would have the ability to make it.
The OPCW is currently conducting its own test on the nerve agent. Russia says it won't recognize the results unless it's allowed to participate in the testing.