The bridges had already been damaged in airstrikes by the US-led coalition in recent weeks. In previous instances of ISIS taking out bridges ahead of Iraqi troop advances, including in the cases of military operations in Qayyara and Anbar, Iraqi forces built temporary or floating bridges, causing troops to slow down but not to stop. JUST WATCHED CNN walks through a city destroyed by ISIS Replay More Videos ... MUST WATCH CNN walks through a city destroyed by ISIS 03:04On Friday, Iraqi Counter-Terrorism Forces announced troops had reached Mosul's "Second Bridge," located on the east bank of the Tigris River, according to Iraq's Joint Operations Command. The Tigris River divides eastern and western Mosul. Iraqi-led forces have not crossed into or started any anti-ISIS operations in western Mosul to date.

Source: CNN January 13, 2017 16:31 UTC