Peshmerga forces fire an anti-aircraft gun towards Islamic state militants positions in the town of Naweran near Mosul, Iraq, October 20, 2016. (Photo by Zohra Bensemra/Reuters)





Smoke rises at Islamic State militants' positions in town of Naweran near Mosul, Iraq October 20, 2016. (Photo by Zohra Bensemra/Reuters)





A Kurdish Peshmerga fighter takes position in front of an Islamic State militants' position outside the town of Naweran near in Mosul, Iraq October 20, 2016. (Photo by Zohra Bensemra/Reuters)





Peshmerga forces prepare their anti-tank guided missiles in front of Islamic state militants' positions at the town of Naweran near Mosul, Iraq October 20, 2016. (Photo by Zohra Bensemra/Reuters)





Peshmerga forces advance at north of Mosul, during an operation to attack Islamic State militants in Mosul, Iraq, October 20, 2016. (Photo by Ari Jalal/Reuters)





A member of the Peshmerga forces sits on a military vehicle at north of Mosul, during an operation to attack Islamic State militants in Mosul, Iraq, October 20, 2016. (Photo by Ari Jalal/Reuters)





A member of Iraqi security forces gestures at Bartila in the east of Mosul during an attack on Islamic State militants in Mosul, Iraq, October 20, 2016. (Photo by Reuters/Stringer)





An Iraqi special forces soldier fires a cannon at Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi journalist reacts after an Islamic State suicide bomber attacked an Iraqi special forces unit with a car bomb during clashes in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





Wounded Iraqi special forces soldiers react during clashes with Islamic Sates fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi special forces soldier's shadow is pictured among bullet shells as he fires his rifle at Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





Iraqi special forces soldiers run for cover during clashes with Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi special forces soldier fires a RPG during clashes with Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi special forces soldier gestures during clashes with Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





A wounded Iraqi special forces soldier walks during clashes with Islamic Sates fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi special forces soldier fires his rifle during clashes with Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





An Iraqi special forces soldier fires an RPG during clashes with Islamic States fighters in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





Iraqi special forces soldiers sit on top of an armoured vehicle next to a flag of Imam Hussein in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





Iraqi special forces soldiers run during clashes in Bartella, east of Mosul, Iraq October 20, 2016. (Photo by Goran Tomasevic/Reuters)





A member of Iraqi army prays after the liberation of Khalidiya village from Islamic State militants south of Mosul, during an operation to attack Islamic State militants in Mosul, Iraq, October 20, 2016. (Photo by Thaier Al-Sudani/Reuters)





Iraqi forces fire a M109 self-propelled howitzer towards the village of Al-Muftuya from a position in Kani al-Harami, some 35 kilometres of Mosul, on October 19, 2016, during an operation against Islamic State (IS) group jihadists to retake the main hub city. Iraqi forces prepared to retake several key areas around Mosul, including the country's largest Christian town, to tighten the noose on the Islamic State group's stronghold. (Photo by Bulent Kilic/AFP Photo)





A Kurdish Peshmerga fighter leans out of his military vehicle which has taken several direct hits from ISIS snipers including on the windscreen on October 18, 2016 in the small town of Bartella near Mosul, Iraq. Joint forces from countries including Britain, U.S.A and France have joined Iraq and Iraqi Kurdistan to launch what is believed to be the largest ground operation since the invasion of Iraq in 2003 to retake Iraq's second largest city from the Islamic State who have held it since 2014. (Photo by Carl Court/Getty Images)





Kurdish Peshmerga forces gather prior to opening up a front against Islamic state in Nawaran, some 20 kilometers (13 miles) northeast of Mosul, Iraq, Thursday, October 20, 2016. Peshmerga are launching an offensive to take the villages on the Nawaran mountain, pulling closer to Mosul. (Photo by Marko Drobnjakovic/AP Photo)





Iraqi army soldiers raise their weapons in celebration on the outskirts of Mosul, Iraq, Thursday, October 20, 2016. Iraqi special forces charged into the Mosul battle Thursday with a pre-dawn advance on the nearby town held by the Islamic State group, a key part of a multi-pronged assault on eastern approaches to the besieged city. (Photo by AP Photo)





A man takes a selfie in front of a fire from oil that has been set ablaze in the Qayyarah area, some 60 kilometres (35 miles) south of Mosul, on October 19, 2016, during an operation by Iraqi forces against Islamic State (IS) group jihadists to retake the main hub city. In the biggest Iraqi military operation in years, forces have retaken dozens of villages, mostly south and east of Mosul, and are planning multiple assaults for October 20. (Photo by Yasin Akgul/AFP Photo)





Peshmerga forces located in Duberdan village at Bashiqa front attack Daesh targets with the Katyusha rocket launchers during the operation to retake Iraq's Mosul from Daesh, in Mosul, Iraq on October 20, 2016. A much anticipated Mosul offensive to liberate the city from Daesh began midnight of 16th of October. (Photo by Ferhat Jahan Panah/Anadolu Agency/Getty Images)





A member of the Iraqi government forces takes a position on top of a vehicle as smoke rises on the outskirts of the Qayyarah area, some 60 kilometres (35 miles) south of Mosul, on October 20, 2016, during an operation against Islamic State (IS) group jihadists to retake the main hub city In the biggest Iraqi military operation in years, forces have retaken dozens of villages, mostly south and east of Mosul, and are planning multiple assaults for October 20. (Photo by Bulent Kilic/AFP Photo)





A helicopter lands on a road in Nawran village, some 10 km north east of Mosul, on October 20, 2016, during the ongoing operation to retake the city from the Islamic State (IS) group The operation is Iraq' s biggest in years and aims to wrest back Mosul, the country' s second city and the last major IS stronghold in Iraq. (Photo by Safin Hamed/AFP Photo)





A man stands in front of a fire from oil that has been set ablaze in the Qayyarah area, some 60 kilometres (35 miles) south of Mosul, on October 19, 2016, during an operation by Iraqi forces against Islamic State (IS) group jihadists to retake the main hub city. (Photo by Yasin Akgul/AFP Photo)





Iraqi soldiers walk on a road as smoke billows from the Qayyarah area, some 60 kilometres (35 miles) south of Mosul, on October 19, 2016, during an operation against Islamic State (IS) group jihadists to retake the main hub city. (Photo by Yasin Akgul/AFP Photo)





A Iraqi soldier looks on as smoke billows from the Qayyarah area, some 60 kilometres (35 miles) south of Mosul, on October 19, 2016, during an operation against Islamic State (IS) group jihadists to retake the main hub city. (Photo by Yasin Akgul/AFP Photo)





Iraqi internally displaced kids are seen as they have arrived at Al Qayyarah town, secured by Iraqi Army, in Mosul, on October 19, 2016 after they have fled from Daesh controlled areas of Mosul to find safer locations as the operation to retake Iraq's Mosul from Daesh continues. A much anticipated Mosul offensive to liberate the city from Daesh began midnight Sunday. (Photo by Yunus Keles/Anadolu Agency/Getty Images)





A member of Iraq's elite counterterrorism forces stands as they advance towards the city of Mosul, Iraq, Thursday, October 20, 2016. Iraqi special forces charged into the Mosul battle Thursday with a pre-dawn advance on a nearby town held by the Islamic State group, a key part of a multi-pronged assault on eastern approaches to the besieged city. (Photo by Khalid Mohammed/AP Photo)





Iraqi internally displaced kids are seen as they have arrived at Al Qayyarah town, secured by Iraqi Army, in Mosul, on October 19, 2016 after they have fled from Daesh controlled areas of Mosul to find safer locations as the operation to retake Iraq's Mosul from Daesh continues. (Photo by Yunus Keles/Anadolu Agency/Getty Images)





Iraqi internally displaced civilians are seen as they have arrived at Al Qayyarah town, secured by Iraqi Army, in Mosul, on October 19, 2016 after they have fled from Daesh controlled areas of Mosul to find safer locations as the operation to retake Iraq's Mosul from Daesh continues. (Photo by Yunus Keles/Anadolu Agency/Getty Images)