Iraqi soldiers discover ISIS chemical weapons stash in MosulIraqi forces discover mustard chemical agents, Russian-made rockets at abandoned ISIS warehouse.
ISIS could use chemical weapons, warns British ministerBritish Security Minister warns that ISIS wants to carry out a massive attack in Britain and wouldn't hesitate to use chemical weapons.
Liberman: Israel stopped Hezbollah from getting chemical weaponsDefense Minister says Israel has acted to prevent the smuggling of Syrian chemical weapons to Hezbollah.
Syria: Claims we used chemical weapons are liesSyria launches blistering attack on "Western" countries that have accused it of using chemical weapons.
22 rebels hit by ISIS chemical attackISIS attacks Syrian rebels with chemical weapons.
OPCW probing over 20 reports of Syria chemical attacksOrganization for the Prohibition of Chemical Weapons believes ISIS may have manufactured mustard gas used in Syria and Iraq.
UN extends Syria chemical attacks probeSecurity Council extends mandate of a panel investigating chemical attacks in Syria until November 18.
Syrian rebels use toxic gas in AleppoSyrian state media claims rebels fired shells containing toxic gas into government-held parts of Aleppo.
Russia: Report on Syria chemical weapons unconvincingRussia dismisses UN-led investigation showing that Syrian forces carried out three chemical attacks, opposes sanctions.
Syrian government uses chemical weapons - againSyrian gov't uses chemical weapons a third time, Security Council 'to discuss report' only on Thursday.
ISIS could use chemical weapons, warn American officialsThe United States expects ISIS to use crude chemical weapons against those trying to conquer the city of Mosul.
Amnesty International: Sudan used chemical weapons on own peopleSudanese government carried out multiple attacks using chemical weapons on own civilians, according to report by Amnesty International
Pentagon: ISIS is preparing a chemical attackPentagon spokesman warns the Islamic State is determined to use chemical arms and likely to try them again in Iraq.
ISIS uses mustard agent in IraqAmerican officials say ISIS fired a shell containing mustard agent that landed at a based used by Amercan and Iraqi troops.
Coalition planes destroy ISIS chemical factory near MosulPentagon says US-led warplanes destroyed ISIS factory used to produce chemical weapons, confirming longstanding suspicions.
Will Syria gas attacks probe condemn the Assad regime?A yearlong investigation to determine who is behind deadly chemical attacks in Syria takes center stage at the United Nations this week.
Russia accuses Syrian rebels of using poison gasRussian defense ministry says seven people died in an attack by Syrian rebels using weapons loaded with a "poisonous agent".
IDF Prepares for Possible Chemical Warfare ThreatISIS is reportedly already moving chemical weapons into Syria and Iraq, causing concerns for Israel.
Israel believes Syria used sarin gas on ISISDid Assad save his deadliest weapon despite an international effort to destroy his arsenal?
Syrian opposition: Hezbollah using chemical weaponsLebanese terrorist group accused of using chemical weapons against rebel areas, particularly in Aleppo and Ghouta.
Watchdog: ISIS may be manufacturing its own chemical weaponsHead of Organization for the Prohibition of Chemical Weapons warns of evidence jihadists now capable of producing WMDs.
Report: Israel hunting chemical-armed ISIS terrorists in GolanIsraeli intelligence agencies in a race against time against ISIS cell located on Syrian side of the border, according to report.
'Clear and present threat' of chemical attacks in EuropeRussia calls for tougher measures against rebel groups in Syria, warning future terror attacks in Europe could involve chemical weapons.
161 chemical weapons reportedly used during Syrian conflictThe Syrian American Medical Society reports 1,491 deaths caused by chemical attacks, with 14,581 people injured.
Iraqi PM promises retaliation after ISIS chemical weapons attackOne killed, hundreds injured in ISIS mustard gas attack. Iraq vows to retaliate.
Iraqi girl dies after ISIS chemical attackThree-year-old Iraqi girl dies after being wounded in an ISIS chemical attack near Kirkuk.
US coalition strikes ISIS chemical weapon sitesCaptured ISIS operative proves to be a treasure trove of intel, helping US launch first air strikes on the jihadists' chemical weapons.
Lights out for Syria as electricity mysteriously cut nationwideIn the midst of a partial ceasefire, Syria's electric grid suddenly shut down, cutting off power nationwide. Internet services also cut.
State Department 'aware' of reports of Syria chemical attacksState Department spokesman: Washington is aware of reports that chemical weapons were used in Syria, but can't confirm them.
Yaalon: Syrian regime used chemical weapons during ceasefireIsraeli Defense Minister claims regime forces have carried out several chemical attacks involving chlorine gas since onset of ceasfire.
Watch: Iran gears up for chemical warIn unveiling new weapons including chemical suits, medicine for chemical agents, Defense Minister vows to continue 'foiling' US sanctions.
Sanders adviser suggests Israel gassed SyriansForeign policy adviser to Bernie Sanders bashes 'Jewish lobby' controlling America, suggests Israel may have gassed Syrians in 2013.
UN team probing chemical attacks to visit Syria in MarchUN team tasked with identifying those responsible for chemical attacks in Syria will begin investigations in early March.
ISIS is using chemical weaponsThe Islamic terror group produced, used chemical weapons on Iraqi Kurds, reports OPCW, in first known chemical terrorism in 20 years.
CIA chief: ISIS has used and can make chemical weaponsCIA director John Brennan warns that ISIS has the capability to make small quantities of chlorine and mustard gas.
Former Libyan official: ISIS got Qaddafi's chemical weaponsLibyan former intelligence official claims terrorist groups got hold of Qaddafi's chemical weapons arsenal and then smuggled it to Syria.
Syria denies using chemical weapons in civil warSyria tells global watchdog it is fully cooperating with the destruction of its toxic stockpile, as agreed upon in 2013.
Tests Show ISIS Used Mustard Gas on KurdsBlood samples show ISIS used chemical weapons in assault against Kurdish forces in Iraq.
US: 'We Know ISIS is Using Mustard Gas'The US intelligence community is convinced ISIS has manufactured, or found, mustard gas - and moved on to chemical warfare.
Doctors Without Borders: Syrians Likely Exposed to ChemicalsDoctors Without Borders reports treating four patients in Syria who showed symptoms of exposure to chemical agents.
Early Tests Find Traces of Mustard Gas in ISIS MortarsSenior American military official confirms preliminary tests show traces of sulfur mustard on mortars fired by ISIS.
Chemical Watchdog 'Concerned' by ISIS Use of Mustard GasOrganization for the Prohibition of Chemical Weapons voices serious concern over reports that ISIS used chemical weapons.
Testing Confirms ISIS Used Mustard Gas in SyriaOfficials say test results from ISIS attack in Syria confirm mustard agent was used. Similar attack in Iraq still under investigation.
Report: ISIS Used Mustard Gas Against Kurds in IraqSenior American officials say it is believed ISIS jihadists used mustard agent in an attack on Kurdish forces in Iraq.
Officials: Despite Inspections, Syria Kept its Chemical ArsenalInspectors reveal regime lied to them and hid chemical arsenal, but Western governments refused to press Assad.
Syrian Kurds Say ISIS Used Chemicals Against ThemKurds, monitoring group say ISIS fighters fired missiles containing toxic gas at Kurdish forces in Syria last month.
Entire Syrian Chemical Weapon Stock DestroyedOPCW hails completion of 2-year mission to destroy Syria's sarin and mustard gas stores.
Report: Israel Helped Obama Prevent Syria StrikesNew book alleges top Israeli officials pitched intervention plan on Syria chemical weapons fiasco - and set poor precedent for Iran.
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.
Ya'alon: Chemical Threat from Syria Has DroppedDefense Minister says the chemical threat from Syria has dropped due to international pressure.
Diplomats: Traces of Undeclared Sarin and VX Found in SyriaInternational inspectors have found traces of sarin and VX nerve agent in Syria that had not been declared to the OPCW.
Assad: There Are No Iranian Troops in SyriaSyria's President admits he invited Hezbollah to fight alongside his regime but denies Iran has sent troops to participate in the civil war.
Assad Has 'Paid no Price for Chemical War Crimes'UN Security Council hears evidence from doctors of chemical attacks; 'attacks come from helicopters - which only Assad has.'
HRW: 'Strong Evidence' Syrian Regime Used Chlorine Gas AgainPair of attacks in Idlib province likely from regime helicopters, rights group insists.
ISIS Chemical Weapon Attack - in Indonesia?Indonesian police say gas attack in Jakarta last month was the work of jihadists returning home from Syria.
UN Head of Disarmament Steps DownRepresentative in charge of disarming Syria's chemical weapons steps down, will be replaced by adviser to Ban Ki-Moon.
Syria Starts Razing Chemical Weapons SitesOPCW: Syrian regime destroying terror tunnels, chemical smuggling routes in long-awaited move as part of international deal.