Iraqi troops, militia forces retake al-Alam from IS

Forces reclaimed the town, a strategically important location close to Tikrit, Saddam Hussein's home city

Iraqi troops and militias drove Islamic State insurgents out of the town of al-Alam on Tuesday, clearing a final hurdle before a planned assault on Saddam Hussein's home city of Tikrit in their biggest offensive yet against the ultra-radical group.

The power base of executed former president Saddam's clan, Tikrit is the focus of a counter-offensive against Islamic State by more than 20,000 troops and Shi'ite Muslim militias known as Hashid Shaabi, backed by local Sunni Muslim tribes.

If Iraq's Shi'ite-led government is able to retake Tikrit it would be the first city taken back from the Sunni insurgents and would give it momentum in the next, pivotal stage of the campaign - to recapture Mosul, the largest city in the north.

Mosul in the far north is the largest city held by the ultra-radical Islamic State, who now rule a self-declared cross-border caliphate in Sunni regions of Syria and Iraq.

The group has, in the last few months, lost ground in Iraq to the army, Shi'ite militias and Kurdish peshmerga forces, backed by air strikes carried out by a U.S.-led coalition of mainly Western and allied Arab states.