Syrian regime reportedly uses chlorine in AleppoDozens of people treated for breathing problems in Aleppo after regime helicopters drop barrel bombs which may have contained chlorine gas.
OPCW concerned over chlorine attack near AleppoChemical weapons watchdog voices concern over reports of a chlorine gas attack in which 24 people were injured.
CIA chief: ISIS can make chemical weaponsCIA director John Brennan warns that ISIS has the capability to make small quantities of chlorine and mustard gas.
OPCW 'confident' mustard gas was used in SyriaUN chemical weapons watchdog confirms mustard gas was used in Syria in August, and also reports yet another chlorine attack.
United States Investigation of Chlorine AttacksUnited States asks Security Council to set up an investigative panel to identify those behind deadly chlorine gas attacks in Syria.
Russia Wants Answers on Syria Chlorine Gas AttacksEven Syria's longtime ally says an investigation is warranted into reports of up to 45 attacks in recent months on innocent Syrians.
Obama: Chlorine Not 'Historically' a Chem. WeaponPOTUS insists that US is investigating reports of attacks, but implies that chlorine may not justify action against Syria.
Hezbollah 'Apparently Already Has Chlorine Gas'Defense Minister says IDF will not allow transfer of chlorine bombs from Syria, but it may be too late. Assad using chlorine on civilians.
US to UN: Investigate Syrian Chemical Weapons UseDiplomats say there is 'mounting evidence' of more chlorine gas attacks despite lengthy chemical removal process.
HRW: 'Strong Evidence' Assad Used Chlorine GasPair of attacks in Idlib province likely from regime helicopters, rights group insists.
Kerry: We're Investigating Syria Chlorine AttackSecretary of State warns Syria of consequences if it is discovered the regime used chlorine gas this week.
Syria: Children Among Dead in Regime Gas AttackBarrel bomb attack by government forces in Idlib province allegedly contained chlorine gas. Three young children among the dead.
United States Concerned About ISIS Use of ChlorineAmerican military "concerned" about reports that ISIS jihadists used chlorine gas, but cannot confirm the account.
Security Council Condemns Use of Chlorine in SyriaUN Security Council condemns the use of chlorine in Syria, threatens measures if chemicals are used in future attacks.
UN Investigators Confident Chlorine Used in SyriaChemical weapons investigators conclude "with a high degree of confidence" that chlorine gas was used in Syria last year.
Syria: We Didn't Use Chlorine - 'Terrorists' DidSyria’s deputy foreign minister denies his government used chemical weapons or chlorine, places the blame on the rebels.
Report: ISIS Used Chemical Weapons Against IraqRumored chlorine gas attack in Iraq raises questions - was the group's stronghold in Syria responsible for other attacks?
Kerry: Assad Will be Held to Account Over ChlorineSecretary of State John warns Assad's regime it would be held to account for using chlorine gas against civilians.
Kerry: Assad Violated Chemical Weapons TreatySecretary of State says there is evidence that Syrian President is using chlorine gas “in violation” of a global chemical weapons treaty.
OPCW Confirms Chlorine Gas was Used in SyriaThe Organization for the Prohibition of Chemical Weapons says it found "compelling confirmation" of the use of chlorine gas in Syria.
Inspectors: Chlorine Gas Likely Used in SyriaChemical weapons inspectors say they found information suggesting that chlorine gas had been used in Syria.
Chlorine Gas in Syria? Results 'Inconclusive'Paris backpedals on statements accusing Syrian regime of using chlorine gas after lab tests prove nothing.