Iraqi forces faced tough resistance from the Islamic State group Tuesday as they attempted to enter the center of Fallujah, where there were mounting fears for thousands of trapped civilians.
A day after announcing a push into the jihadist bastion, forces led by Iraq's elite counter-terrorism service had some way to go before retaking the city.
After thrusting toward Fallujah from three directions on Monday, their biggest advance was from the south, where they pushed into the suburb of Naimiyah.
Lieutenant General Abdelwahab al-Saadi, the overall commander of the Fallujah operation, said Islamic State fighters mounted a fierce counter-attack on the area early on Tuesday.
"There were around 100 fighters involved, they came at us heavily armed but did not use car bombs or suicide bombers," he told AFP.
Saadi said Iraqi forces in the area, which also include police and army units, were eventually able to repel the attack, killing 75 jihadists. He did not give a figure for losses on the pro-government side.
Officers said U.S.-led coalition and Iraqi air support was instrumental in repelling the attack and added that ground forces had now resumed their advance.
Fallujah, which lies on the Euphrates River west of Baghdad, slipped from government control months before IS swept across large parts of Iraq in June 2014 and is an emblematic bastion for the jihadist group.
Iraqi forces have been sealing off Fallujah for months and those still in city — IS fighters and civilians alike — have nowhere to go.Anbar capital Ramadi was almost levelled when Iraqi forces retook it a few months ago but many more civilians — most estimates say around 50,000 — are trapped inside Fallujah.