Meanwhile, Turkey dispatched a large military convoy deep inside rebel-held territory to establish an observation post at Tel al-Eiss, close to the front line with government forces, according to activists who filmed the convoy's movements.
"It is like the end of days", said Raed Saleh, the head of the first-responders known as White Helmets, describing the last 24 hours of attacks on the opposition-held eastern Damascus suburb of Ghouta and northwestern Idlib province.
Haley told the U.N. Security Council that Russian Federation has delayed adoption of a council statement condemning the use of chemical weapons, including a reported chlorine gas attack Thursday in the opposition-held Damascus suburb of eastern Ghouta that injured over 20 civilians including children. Surrounding villages have been battered by air raids that left hospitals filled with wounded children. As well as taking military action, Turkey's politicians are now also growing in confidence in speaking out against the US.
Speaking about Turkey's attack on Afrin, which is aimed at the Kurdish People's Protection Units (YPG), Mogherini warned Ankara, "The people of Syria can not afford a new front and a new crisis".
"This displaced population movement in Syria has brought some problems for Turkey, because at the moment we are hosting more than 3 million displaced people".
The Organisation for the Prohibition of Chemical Weapons said a fact-finding mission "is investigating all credible allegations".
The lead investigator of a UN-mandated Commission of Inquiry on Syria said his team was looking into the reports bombs allegedly containing weaponised chlorine were used on two recent occasions in the town of Saraqeb, in Idlib, and Douma, in Eastern Ghouta.
The last Armenian in Afrin noted that Afrin was one of the few regions of Syria that had avoided war.
The US said there was "obvious evidence" of recent chlorine gas attacks, including in eastern Ghouta.
The U.S. and Russian Federation have been lashing out at each other for months over the issue of accountability for chemical attacks in Syria, which is a close ally of Moscow. Almost five years later, more than 80 people were killed in another chemical attack on Khan Sheikhoun in Idlib province.
Syrian government has been critical of Aljazeera and Al-Arabia TV channels coverage from the very beginning of the crisis in 2011.
When the UN Security Council tries to pass motions condemning the use of chemical weapons, Russian Federation repeatedly vetoes. "This council has been outspoken on ending Syria's use of chemical weapons, and yet, they continue".
In apparent retaliation, rockets were fired on several Damascus neighborhoods, killing three civilians, Syria's state news agency SANA reported.
Meanwhile, Turkish operations against Syrian Kurdish forces and United States and Russian-backed operations against ISIL continue to compound human suffering in the country's north and east.
Ibrahim Kalin, a spokesman for Turkish President Recep Tayyip Erdogan said Wednesday that the United States must end policies that "poison" relations, including support for Syrian Kurdish militia.