Central Command says that a combination of US attack, fighter and drone aircraft destroyed or damaged eight armed vehicles, two of which were transporting anti-aircraft artillery near the dam. It says six other vehicles also were struck.
The attacks were carried out overnight yesterday into this morning.
The US has conducted 153 airstrikes in Iraq since August 8. It began attacking Islamic State forces near the Haditha Dam last weekend, citing it as a strategic target that could not be allowed to fall into the extremists' hands.
