FILE - In this Oct. 6, 2014, file photo, Army soldiers search Iraqis amid tight security during Eid al-Adha celebrations in Baghdad, Iraq. Iraqâ€™s fractured army has begun to regroup and stage modest, localized attacks on the Islamic State militants who routed them last spring and summer, but they are unlikely to be ready to launch a major counteroffensive for many months, senior U.S. military officials said Thursday. (AP Photo/Karim Kadim, File)
BAGHDAD — Islamic State militants used chlorine gas during fighting with security forces and Shiite militiamen last month north of Baghdad, Iraqi officials said on Friday.
The use of chlorine gas as a weapon adds a new concern to the turmoil in the country. The reports, if confirmed, would be the first time the Sunni extremists attempted to use chlorine since their blitz earlier this year that seized large chunks of territory in northern Iraq and neighboring Syria.
Three Iraqi officials — a senior security official, a local official from the town of Duluiya and an official from the town of Balad — told The Associated Press that the Islamic State group used bombs with chlorine-filled cylinders during clashes in late September in the two towns.
The militants have failed to capture both Duluiya, 75 kilometers (45 miles) north of Baghdad, and Balad, 80 kilometers (50 miles) north of the Iraqi capital.
In the attacks, about 40 troops and Shiite militiamen were slightly affected by the chlorine and showed symptoms consistent with chlorine poisoning, such as difficulty in breathing and coughing, the three officials said. The troops were treated in hospital and quickly recovered.
The senior security official said it was most likely that the Islamic State fighters obtained the chlorine from water purification plants located in the areas they had overrun earlier. Iraqi intelligence has indicated that the IS group has some shells filled with chlorine and they are ready to be used, the official also said.
"The IS fighters seized some quantities of chlorine after seizing control of some water purification plants or sites where chlorine was kept," said the senior official, adding that the "IS group has some experts who were able to manufacture chlorine shells."
The three officials, who spoke on condition of anonymity because they were not authorized to speak to media, did not elaborate or provide more details. The use of chlorine by the IS group in Iraq in September was first reported by the Washington Post.
Chlorine, a chemical used in industry and water purification process, was first introduced as a chemical weapon at Ypres in World War I with disastrous effects because gas masks were not easily available at the time.
In neighboring Syria, a joint U.N. fact-finding mission sent to investigate alleged chlorine attacks was ambushed and briefly detained by armed men earlier this year in rebel-held territory. The mission had said it was virtually certain chlorine had been used as a chemical weapon in the country's north.
Syrian President Bashar al-Assad had agreed with the United States and Russia to dispose of his chemical weapons — an arsenal that Damascus had never previously formally acknowledged — after hundreds of people were killed in a sarin gas attack on the outskirts of the capital, Damascus, in the summer of 2013. But chlorine was not listed as part of the Syrian arsenal.
Chlorine gas, when inhaled, swallowed or exposed to through skin causes difficulty in breathing, coughing, and eye and skin irritation. It is not as toxic or effective at killing as sarin, a nerve agent, and experts say it is difficult to achieve high concentrations of chlorine by dropping it from the air.
In 2011 in Baghdad, hundreds of people were sickened by a chlorine gas cloud that leaked over the Iraqi capital after an explosion at a water treatment plant.
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