Iraqi Parliament will vote on a new government on Monday as the US expanded its air campaign against the terrorist group operating in Iraq and Syria, ISIL.

Iraqi Parliament will vote on a new government on Monday as the US expanded its air campaign against the terrorist group operating in Iraq and Syria, ISIL.

Meanwhile, US President Barack Obama has announced he will unveil a strategy to fight the Takfiris, and Arab states vowed to take all "necessary measures" to confront the threat.

Premier-designate Haidar al-Abadi is hoping to bring some stability to Iraq's fractious politics at a time when it is struggling to combat the threat from ISIL militants who have seized control of swathes of the country.

The United States stepped up its month-long air campaign against ISIL on Sunday, striking targets around the strategic Haditha dam on the Euphrates River.

Iraqi forces sought to capitalize on the air strikes, which have largely been limited to the north since they began on August 8, attacking terrorists in the area and retaking the town of Barwana.

Obama made his political career opposing the war in Iraq and pulled out US troops in 2011, but has recently drawn flak for failing to outline a strategy to combat ISIL.

He announced he will make a speech on Wednesday to lay out his "game plan" to deal with the terrorists.

"I'm preparing the country to make sure that we deal with a threat from" ISIL, Obama said in an interview aired Sunday on NBC's "Meet the Press".

He said he would not announce the return of American ground troops to Iraq, and would focus instead on a "counter-terrorism campaign".

"We are going to systematically degrade their capabilities. We're going to shrink the territory that they control. And ultimately we're going to defeat them," Obama said.

Arab League chief Nabil al-Arabi, meanwhile, said the bloc's 22 members had agreed to confront ISIL.

"The Arab foreign ministers have agreed to take the necessary measures to confront terrorist groups including" IS, he told reporters in Cairo, without explicitly supporting US calls for a coalition to back its air campaign.

Sunday's US air strikes targeted an area that the militants have repeatedly tried to capture from government troops and their Sunni militia allies.

The strikes destroyed four Humvees, four armed vehicles, two fighting positions and a command post, the US Central Command said in a statement.

Pentagon spokesman Rear Admiral John Kirby said in an earlier statement that "the potential loss of control of the dam or a catastrophic failure of the dam -- and the flooding that might result -- would have threatened US personnel and facilities in and around Baghdad, as well as thousands of Iraqi citizens".

Iraqi troops and militia retook Barwana, east of Haditha, from the Takfiris, who abandoned their weapons and vehicles in their retreat, an AFP correspondent reported.

"Joint forces backed by air support and tribesmen launched a wide attack to clear the areas surrounding the Haditha district," security spokesman Lieutenant General Qassem Atta told AFP.

The black ISIL banner was lowered from the town's main checkpoint and the Iraqi flag raised.