Unicef said it had verified 51 attacks on schools in the past year, and in comments by telephone from Sana, the capital, Mr. Harneis said the organization had also seen a "massive spike" in the recruitment of children, some as young as 10, by armed groups, particularly the Houthis.
If verified, the attacks would be a violation of the 1993 Chemical Weapons Convention, an international treaty Syria signed in 2013 that bans the use of chemical weapons.
"This attack is both reliable and practical, requiring no specialist hardware," said Andrew Tierney, a security researcher with Pen Test Partners, who verified the attack.
He added that the toll from Russian airstrikes may rise because the group's analysts, who comb through each reported case of a civilian death to verify the attacks, were struggling to keep up with the pace of attacks.
Our DNP3-SA CPN model is capable of testing and verifying various attack scenarios: modification, replay and spoofing, combined complex attack and mitigation strategies.
We collected data on the lifelong presence of headache and verified if headache attacks had occurred in the three months prior to the interview.
Since 1986, she said, there have been 14 verified mountain lion attacks on people in California, three of them fatal.
In California, there have only been 16 verified mountain lion attacks on humans since 1890, and the last one occurred in 2007 in Humboldt County, according to the Department of Fish and Game.
Asked about the chemical attack on the Aleppo district of Zubdiya, he said there was a lot of evidence that it took placeand it would constitute a war crime if chlorine gas was used, but he added that it was not his remit to verify the attack.
