By John Lee.
U.S. Army Lieutenant General Sean MacFarland has said the US military was working with the Iraqi government on a plan to protect civilians in the event of a collapse of Mosul Dam.
Reuters quotes him as telling journalists in Baghdad:
"The likelihood of the dam collapsing is something we are trying to determine right now ... all we know is when it goes, it's going to go fast and that's bad.
"If this dam was in the United States, we would have drained the lake behind it. We would have taken that dam out of commission."
There are fears that a failure of the dam would send a surge of water down the heavily-populated Tigris valley.
Reuters reports that the Italian Trevi Group is finalising a contract to upgrade the 3.6-km (2.2-mile) long dam, which has suffered from structural flaws since it was built in the 1980s.