Militants in Iraq 'may use dams as weapons'
5 August 2014 Last updated at 07:05 BST
People in the Iraqi desert have long been dependent on the Tigris and Euphrates rivers.
But there are fears that Isis militants could take control of the country's dams, and use them to inflict drought or flooding on communities who live alongside them.
The BBC's Jiyar Gol reports.