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ISIS used chemical weapons at least 71 times in Iraq, Syria

An Iraqi man who fled the fighting between Islamic State militants and the Iraqi forces, carries a handicapped girl at a camp for internally displaced people, in Khazer east of Mosul, Iraq, Monday, Nov. 21, 2016. Iraqi troops fighting Islamic State militants in the eastern outskirts of Mosul regrouped Monday in the city's neighborhoods they recently retook from the extremist group, conducting house-to-house searches and looking for would-be suicide car bombs, a top Iraqi commander said. (AP Photo/Hussein Malla).
An Iraqi man who fled the fighting between Islamic State militants and the Iraqi forces, carries a handicapped girl at a camp for internally displaced people, in Khazer east of Mosul, Iraq, Monday, Nov. 21, 2016. Iraqi troops fighting Islamic State militants in the eastern outskirts of Mosul regrouped Monday in the city's neighborhoods they recently retook from the extremist group, conducting house-to-house searches and looking for would-be suicide car bombs, a top Iraqi commander said. (AP Photo/Hussein Malla).

Iraqi troops moved on Tuesday to retake another neighbourhood in the eastern sector of the northern city of Mosul but were facing stiff resistance from Islamic State militants, according to a top Iraqi commander.

A new analysis, meanwhile, has found that there was high risk that IS would deploy chemical weapons against Mosul civilians or Iraqi troops fighting to retake the city. According to IHS Markit, the extremist group has used chemical weapons at least 71 times since its fighters swept across much of Iraq and Syria in 2014.

READ MORE: Chemical attacks by Islamic State on the rise, UN says

Reached by telephone in Mosul, Brig. Gen. Haider Fadel of the Iraqi pecial forces told The Associated Press that IS fighters were targeting his forces with rockets and mortars as they slowly advanced in the densely populated Zohour neighbourhood.

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“We are cautiously advancing. There are too many civilians still living there,” he said.

Iraqi troops began their siege of Zohour on Sunday as they fortified their positions in neighbourhoods they had already retaken in eastern Mosul. Suicide bombings, sniper fire and concerns over the safety of civilians – there are 1 million civilians still in Mosul – have combined to slow down progress in the campaign to liberate the city, which began Oct. 17.

WATCHAnti-ISIS forces reportedly closer to retaking Mosul 

Click to play video 'Anti-ISIS forces reportedly closer to retaking key Iraqi town' Anti-ISIS forces reportedly closer to retaking key Iraqi town
Anti-ISIS forces reportedly closer to retaking key Iraqi town – Nov 8, 2016

Mosul, captured by IS in the summer of 2014, is Iraq’s second-largest city and the last major IS urban bastion in the country. Most gains in the campaign so far have been made by the special forces operating east of the Tigris River. Other forces, including the Kurdish peshmerga troops and volunteer Sunni militiamen, are advancing on the city from different directions, and the U.S.-led coalition is providing airstrikes and other support.

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An airstrike by the U.S.-led coalition on Monday destroyed a major bridge over the Tigris in the southern part of the city, a move that appears designed to limit the IS capacity to reinforce or resupply fighters on the east bank of the Tigris where most of the fighting is taking place.

READ MORE: UN prepares Iraq medics for possible chemical attack in Mosul

It was the third of the city’s five bridges on the Tigris to be targeted by the coalition – the first two were destroyed in airstrikes shortly before and after the start of the Mosul campaign – a sequence that two Iraqi officers said was likely to soon extend to the remaining two bridges to completely separate the city’s eastern sector from the western bank of the Tigris.

The officers spoke to the AP on condition of anonymity because they were not authorized to speak to the media. The Iraqi military is known to have received U.S.-made pontoon bridges, which Iraqi troops would use as a substitute for the destroyed bridges.

According to the analysis by IHS Markit, a London-based intelligence analyst firm, Mosul served as a centre for chemical weapons production for IS.

However, experts believe IS moved the materials and experts to Syria ahead of the Iraqi offensive to free the city. The analysis concluded that chlorine and mustard agents are the most likely chemicals to be used by IS in the Mosul battle.

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WATCH: Alleged chemical weapons attack as Syrian opposition wraps London talks (Sept. 2016) 

Click to play video 'Alleged chemical weapons attack as Syrian opposition wraps London talks' Alleged chemical weapons attack as Syrian opposition wraps London talks
Alleged chemical weapons attack as Syrian opposition wraps London talks – Sep 7, 2016

IS used chemical weapons 52 times in Syria and 19 times in the Mosul area since 2014, IHS Markit also said.

In Budapest, visiting Iraqi Foreign Minister Ibrahim al-Jaafari told reporters that progress in liberating Mosul has been slowed by IS’ use of human shields and that 1,700 militants have been killed and 120 captured since the battle for Mosul began. A third of Ninevah province, where Mosul is the capital, has been liberated so far, he added.

Iraq, al-Jaafari also said, would need to increase its crude oil output – which he said provided 90 per cent of state budget revenues – and also be exempt from OPEC output quotas because of its “extraordinary situation.”