da Al Jazeera
At least 58 people, including 11 children, have been killed in a "toxic gas" bombing raid on a rebel-held Syrian town, doctors and a monitor said, in an attack the United Nations quickly said it would investigate as a possible war crime.
The Syrian Observatory for Human Rights said the attack on Khan Sheikhoun in Idlib province caused many people to choke or faint, and some to foam from the mouth, citing medical sources who described the symptoms as possible signs that gas was used.
The Edlib Media Centre (EMC), a pro-opposition group, posted images that were widely shared on social media, showing people being treated by medics and what appeared to be dead bodies, many of them children.
It would mark the deadliest chemical attack in Syria since sarin gas killed hundreds of civilians in Ghouta near the capital in August 2013. Western states said the Syrian government was responsible for the 2013 attack. Damascus blamed rebels.
Human Rights Watch also recently accused government helicopters of dropping bombs containing chlorine on rebel-held areas of Aleppo on at least eight occasions between 17 November and 13 December, during the final stages of the battle for the city.
And last week, two suspected chemical attacks were reported in Hama province, in a rebel-held area not far from Khan Sheikhoun.