deadly chemical

Further tests are being carried out to determine the "intensity" of the deadly chemical and to rule out any other toxins.

In December 2020, 15-year-old Tyler Schmidt took a deadly chemical to a wooded area near his home in Camas, Clark County.

He was tracked down to his home in Kyiv and denied that he sold the deadly chemical, which the BBC is choosing not to name.

The petition described Ms Sun's family as having powerful political connections, and it was alleged she "had the motive, and access to the deadly chemical".

The Organization for the Prohibition of Chemical Weapons has blamed the Syrian government for several deadly chemical attacks, most recently for a 2018 chlorine gas attack over Douma, another Damascus suburb, that killed 43 people.