Iraqi forces have held off a jihadist assault on the government headquarters in the capital of Anbar province, deploying reinforcements in the key battleground against the Islamic State group.
Security forces, backed by tribesmen, managed to defend the complex in Ramadi, which lies 100 kilometres west of the Iraqi capital and is one of the last major urban areas in Anbar under Baghdad's control.
The attack by IS fighters on Ramadi, as well as clashes in the northern province of Kirkuk, follow gains made elsewhere by government forces battling to recapture ground from the Sunni extremists.
"We were able to stop the militants from advancing in the government complex," said army Colonel Haytham al-Daraji who was involved in the defence of the area on Wednesday.
Four members of the security forces were killed and 21 wounded, according to the officer and a doctor.
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Daraji said that more than 10 air strikes were carried out against the jihadists in Al-Hoz, an area from which security forces had pulled back, allowing the jihadists to advance to within striking distance of the key government buildings.
He said reinforcements had been deployed in the city.
Parts of Ramadi and all of Fallujah, to its east, have been outside government control since the beginning of the year, but much more of Anbar province has since been seized by IS, which spearheaded a sweeping June offensive that overran swathes of Iraq.
"If we lose Anbar, that means we will lose Iraq," the province's governor, Ahmed al-Dulaimi, told Al-Anbar television from Germany, where he is recovering after being wounded by a mortar round in September.
Iraqi security forces wilted under an initial IS onslaught in June, but are now backed by US-led air strikes, international advisers, Shiite militiamen and Sunni tribes, and have begun to claw back some areas.
IS also holds major territory in Syria, where it is one of the most powerful forces in the country's multi-sided civil war, and has declared a cross-border Islamic "caliphate" encompassing parts of both nations.
State media reported late Wednesday that Syrian troops killed 50 rebels in an operation east of Damascus. The Syrian Observatory for Human Rights, a Britain-based monitoring group, gave a lower death toll of 30.
Syria's Foreign Minister Walid Muallem said Damascus and key ally Russia had agreed during talks on Wednesday to support a UN proposal to "freeze" fighting in the battered northern city of Aleppo.
