Nick Paton Walsh Mosul ISIS gunfire orig_00004713.jpg
Nick Paton Walsh Mosul ISIS gunfire orig_00004713.jpg
Now playing
01:20
Iraq forces and ISIS exchange gunfire
PHOTO: CNN
Now playing
04:32
Mosul survivors search for loved ones
Now playing
01:01
Fleeing ISIS in Mosul: Their faces say it all
Haider al-Abadi Mosul 7/9/17
PHOTO: Iraqi PM Office
Haider al-Abadi Mosul 7/9/17
Now playing
02:01
Iraq's PM claims Mosul liberated from ISIS
Iraq's federal police members wave Iraq's national flag as they celebrate in the Old City of Mosul on July 9, 2017 after the government's announcement of the "liberation" of the embattled city. Iraq declared victory against the Islamic State group in Mosul on July 9 after a gruelling months-long campaign, dealing the biggest defeat yet to the jihadist group.
PHOTO: FADEL SENNA/Getty Images
Iraq's federal police members wave Iraq's national flag as they celebrate in the Old City of Mosul on July 9, 2017 after the government's announcement of the "liberation" of the embattled city. Iraq declared victory against the Islamic State group in Mosul on July 9 after a gruelling months-long campaign, dealing the biggest defeat yet to the jihadist group.
Now playing
05:33
US General: Iraq must continue to attack ISIS
Counter Terror Service (CTS) Troops climb a mound of rubble to reach a house turned fighting position just 50 meters from the Tigris river. They are engaged in fierce clashes to push out ISIS's remaining pockets of resistance.
PHOTO: Salma Abdelaziz/CNN
Counter Terror Service (CTS) Troops climb a mound of rubble to reach a house turned fighting position just 50 meters from the Tigris river. They are engaged in fierce clashes to push out ISIS's remaining pockets of resistance.
Now playing
03:03
Mosul liberation comes at a price
Now playing
01:05
On the ground in Mosul
An Iraqi rescue worker gestures towards bodies wrapped in plastic in the Mosul al-Jadida area on March 26, 2017, following air strikes in which civilians have been reportedly killed during an ongoing offensive against the Islamic State group.  
Iraq is investigating air strikes in west Mosul that reportedly killed large numbers of civilians in recent days, a military spokesman said.
PHOTO: AHMAD AL-RUBAYE/AFP/Getty Images
An Iraqi rescue worker gestures towards bodies wrapped in plastic in the Mosul al-Jadida area on March 26, 2017, following air strikes in which civilians have been reportedly killed during an ongoing offensive against the Islamic State group. Iraq is investigating air strikes in west Mosul that reportedly killed large numbers of civilians in recent days, a military spokesman said.
Now playing
01:55
CNN on the ground in Mosul, Iraq
Now playing
02:10
A history of ISIS in Mosul
Now playing
01:33
Arwa and Mattar: A friendship forged in fear
iraq mosul us investigate claims civilians deaths damon lklv_00001724.jpg
PHOTO: AFP/Getty Images
iraq mosul us investigate claims civilians deaths damon lklv_00001724.jpg
Now playing
02:21
US Com.: 'chance' Iraq strike killed civilians
TOPSHOT - Relatives mourn as bodies of Iraqi residents of west Mosul killed in an airstrike targeting Islamic State (IS) group jihadists are placed and covered with blankets on carts on March 17, 2017. / AFP PHOTO / ARIS MESSINIS        (Photo credit should read ARIS MESSINIS/AFP/Getty Images)
PHOTO: ARIS MESSINIS/AFP/Getty Images
TOPSHOT - Relatives mourn as bodies of Iraqi residents of west Mosul killed in an airstrike targeting Islamic State (IS) group jihadists are placed and covered with blankets on carts on March 17, 2017. / AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)
Now playing
01:57
Cmdr.: Fair chance US airstrike hit civilians
Now playing
02:22
A walk through the devastation of West Mosul
Now playing
02:17
CNN reports during Iraqi, ISIS firefight
iraq mosul us investigate claims civilians deaths damon lklv_00001724.jpg
PHOTO: AFP/Getty Images
iraq mosul us investigate claims civilians deaths damon lklv_00001724.jpg
Now playing
02:49
Over 100 bodies pulled from Mosul rubble
Tanks and armored vehicles of the Iraqi forces, supported by the Hashed al-Shaabi paramilitaries, advance towards the village of Sheikh Younis, south of Mosul, as the offensive to retake the western side of Mosul from Islamic State group fighters commenced on February 19, 2017.
PHOTO: AHMAD AL-RUBAYE/AFP/Getty Images
Tanks and armored vehicles of the Iraqi forces, supported by the Hashed al-Shaabi paramilitaries, advance towards the village of Sheikh Younis, south of Mosul, as the offensive to retake the western side of Mosul from Islamic State group fighters commenced on February 19, 2017.
Now playing
01:34
Battle for Mosul: the one thing to know
Now playing
01:38
US frontline clinic treats Mosul's wounded
(CNN) —  

A major offensive to recapture Mosul from ISIS is under way, as Iraqi-led forces advance on the city, which has been under the terror group’s control since June 2014.

  • Iraq’s military says it has inflicted “heavy losses of life and equipment” on ISIS
  • Airstrikes have been reported at Bartella, 14km east of Mosul
  • More than 54,000 Iraqi troops and 40,000 Peshmerga involved in fight
  • US military officials estimate there are up to 5,000 ISIS fighters in the city
  • At least ten people dead and 17 wounded in ISIS suicide bombing at a Baghdad checkpoint