The OPCW chemical weapons watchdog has supported Britain's analysis of a nerve agent used to poison a Russian former spy in the UK. But it didn't assign blame in the case of Sergei and Yulia Skripal.  

The OPCW said Thursday Sergei Skripal and his daughter Yulia were poisoned with military-grade Novichok.

Britain has blamed Russia for the attack in the English town of Salisbury. But while the OPCW agreed that a state was likely involved, it didn't assign blame.

Yulia Skripal, meanwhile, has turned down an offer of assistance from the Russian embassy.

She said her father remains seriously ill, and she's still suffering side-effects of the nerve agent attack. 

But the Russian embassy said it was clearly fake and strengthened its belief that Yulia Skripal has been abducted by Britain.

It has repeatedly asked for consular access to her.

Skripal said she had access to friends and family, which the embassy said it doubted.

Russia has suggested the British might have staged whole incident to drum up anti-Russian sentiment.

Father and daughter were critically ill for weeks after the attack.

Yulia was discharged this week, and is now in a secret secure location. 

The head of Britain's GCHQ spy agency waded into the spat Thursday, saying the poisoning showed - quote - 'how reckless Russia is prepared to be'.