Rome, December 28 - Iraqi forces backed by US-led airstrikes drove Islamic State (ISIS) militants out of the center of Ramadi on Monday and seized the main government complex there, according to military officials cited by the Associated Press. The officials told AP that insurgents are still dug into pockets of the city west of Baghdad. Ramadi, the provincial capital of the western Anbar province, fell to ISIS in May, marking a major setback for Iraqi forces and the US-led campaign. Ramadi and nearby Fallujah, which is controlled by ISIS, saw some of the heaviest fighting of the eight-year US intervention in Iraq. In recent months Iraqi forces have launched several offensives to retake Ramadi, but all had stalled. Iraqi troops began advancing into some parts of the city, located about 130 kilometers (80 miles) west of Baghdad, earlier this month. But their progress was slowed by snipers, booby traps and the militants' destruction of bridges leading into the city center.