Experts say data could prove crucial in planning a biological or chemical weapons attack in Ukraine
Poisoning 46 people, including eight children being treated in hospital
Watchdogs claim Asad government has removed all evidences of chemical weapons use
Pre-designed scenario is being implemented, once again we are being threatened: Anatoly Antonov
Tough language came after White House accused Assad's regime of preparing a potential chemical weapons attack
The US has taken actions over the past months to show willingness towards strikes in Syria
The sanctions will freeze all assets in the United States belonging to the 271 individuals on the blacklist
Suspected chemical attack left 87 dead including many children in Idlib province on April 4
Western nations accused Syrian regime of carrying out chemical attack, but Moscow seeks to clear the regime of blame
Up to 30,000 people are expected to leave under the deal