The United Nations estimates that 100,000 civilians may still be trapped in the Old City of Mosul, Iraq, the Islamic State’s last and most tightly held stronghold here. More than 230 civilians have been killed by IS sniper fire in recent weeks, and hundreds of others from airstrikes, according to the U.N. Civilians who have fled IS in Mosul say the death tolls are far higher.
Mosul Battle: Searching for Bodies in IS Rubble

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Airstrikes and car bombs over Old Mosul and surrounding areas as Iraqi forces have all but surrounded IS's last stronghold in the city in Mosul, Iraq, June 15, 2017.

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Ahmed Ghalibi, a fighter with the Emergency Response Division says the upcoming battle for Old Mosul, IS's last stronghold in the city, may prove to be the most difficult battle to date in Mosul, Iraq, June 15, 2017.

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Iraqi soldiers say the Old City is surrounded, but the frontlines are fluid as IS continues to fight to expand, taken in Mosul, Iraq, June 15, 2017.