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TOPSHOT - A general view shows the leaning minaret of the Great Mosque of al-Nuri in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

TOPSHOT - A general view shows the leaning minaret of the Great Mosque of al-Nuri in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

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A general view shows smoke billowing from Al-Amil neighborhood in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

A general view shows smoke billowing from Al-Amil neighborhood in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

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A general view shows smoke billowing from Al-Amil neighborhood in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

A general view shows smoke billowing from Al-Amil neighborhood in Mosul, on March 10, 2017, as Iraqi forces shell enemy positions during an offensive to retake the western parts of the city from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

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A general view shows smoke rising near Mosul's landmark leaning Al-Hadba minaret oin the Al-Nuri mosque compound, as Iraqi government forces advance in the city's western Zanjili neighbourhood on June 7, 2017, during ongoing battles against Islamic State (IS) group fighters. / AFP PHOTO / KARIM SAHIB (Photo credit should read KARIM SAHIB/AFP/Getty Images)

A general view shows smoke rising near Mosul's landmark leaning Al-Hadba minaret oin the Al-Nuri mosque compound, as Iraqi government forces advance in the city's western Zanjili neighbourhood on June 7, 2017, during ongoing battles against Islamic State (IS) group fighters. / AFP PHOTO / KARIM SAHIB        (Photo credit should read KARIM SAHIB/AFP/Getty Images)

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TOPSHOT - Smoke billows in a neighbourhood of west Mosul's near Al-Shifa hospital (L) on May 30, 2017 during ongoing battles between Iraqi forces to retake the city from Islamic State (IS) group fighters. Iraqi forces pressed forward with a broad offensive targeting Islamic State group-held areas in west Mosul and called for civilians to leave areas where fighting is taking place. / AFP PHOTO / KARIM SAHIB (Photo credit should read KARIM SAHIB/AFP/Getty Images)

TOPSHOT - Smoke billows in a neighbourhood of west Mosul's near Al-Shifa hospital (L) on May 30, 2017 during ongoing battles between Iraqi forces to retake the city from Islamic State (IS) group fighters.
Iraqi forces pressed forward with a broad offensive targeting Islamic State group-held areas in west Mosul and called for civilians to leave areas where fighting is taking place. / AFP PHOTO / KARIM SAHIB        (Photo credit should read KARIM SAHIB/AFP/Getty Images)