Iraqi forces have launched an attack against the Islamic State-controlled University of Anbar complex in the city of Ramadi, US officials said.
IS militants have been using the sprawling site as a command base since taking control of the city in May.
Some reports suggested Iraqi forces had retaken control of the complex.
The Iraqi military launched an operation this month to push IS out of Anbar province, large swathes of which are controlled by the militants.
This seems a slow motion operation, neither Iran’s Militias or the Iraqi forces have shown they are match for IS to date.