Pompeo: Syria used a chemical weapon
Secretary of State says US concluded that the Assad regime used chlorine as a chemical weapon in an attack in May.
Secretary of State says US concluded that the Assad regime used chlorine as a chemical weapon in an attack in May.
Organization for the Prohibition of Chemical Weapons says deadly sarin and chlorine were used in two separate attacks in Syria.
Organization for the Prohibition of Chemical Weapons investigating alleged chlorine gas attacks in the Syrian region of Eastern Ghouta.
Syrian opposition says the government launched a deadly chlorine gas attack on rebel-held enclave.
Syrian activists say at least 11 people suffered chlorine gas poisoning during attack in Idlib province.
Syrian state media claims rebels fired shells containing toxic gas into government-held parts of Aleppo.
UN inquiry identifies two Syrian Air Force helicopter squadrons and two other units in chlorine gas attacks, says Western diplomat.
Syrian government denies it used chlorine gas in an attack in Aleppo, following which dozens were treated for breathing problems.
Organization for the Prohibition of Chemical Weapons says it is "disturbed" by the alleged use of toxic chemicals in Aleppo.
Dozens of people treated for breathing problems in Aleppo after regime helicopters drop barrel bombs which may have contained chlorine gas.
Chemical weapons watchdog voices concern over reports of a chlorine gas attack in which 24 people were injured.
CIA director John Brennan warns that ISIS has the capability to make small quantities of chlorine and mustard gas.
UN chemical weapons watchdog confirms mustard gas was used in Syria in August, and also reports yet another chlorine attack.
United States asks Security Council to set up an investigative panel to identify those behind deadly chlorine gas attacks in Syria.
Even Syria's longtime ally says an investigation is warranted into reports of up to 45 attacks in recent months on innocent Syrians.
POTUS insists that US is investigating reports of attacks, but implies that chlorine may not justify action against Syria.
Defense Minister says IDF will not allow transfer of chlorine bombs from Syria, but it may be too late. Assad using chlorine on civilians.
Diplomats say there is 'mounting evidence' of more chlorine gas attacks despite lengthy chemical removal process.
Pair of attacks in Idlib province likely from regime helicopters, rights group insists.
Secretary of State warns Syria of consequences if it is discovered the regime used chlorine gas this week.
Barrel bomb attack by government forces in Idlib province allegedly contained chlorine gas. Three young children among the dead.
American military "concerned" about reports that ISIS jihadists used chlorine gas, but cannot confirm the account.
UN Security Council condemns the use of chlorine in Syria, threatens measures if chemicals are used in future attacks.
Chemical weapons investigators conclude "with a high degree of confidence" that chlorine gas was used in Syria last year.
Syria’s deputy foreign minister denies his government used chemical weapons or chlorine, places the blame on the rebels.
Rumored chlorine gas attack in Iraq raises questions - was the group's stronghold in Syria responsible for other attacks?
Secretary of State John warns Assad's regime it would be held to account for using chlorine gas against civilians.
Secretary of State says there is evidence that Syrian President is using chlorine gas “in violation” of a global chemical weapons treaty.
The Organization for the Prohibition of Chemical Weapons says it found "compelling confirmation" of the use of chlorine gas in Syria.
Chemical weapons inspectors say they found information suggesting that chlorine gas had been used in Syria.
Paris backpedals on statements accusing Syrian regime of using chlorine gas after lab tests prove nothing.