U.S. Vows to 'Defeat' IS with 'Broad Coalition', Rules Out Coordination with Iran

U.S. President Barack Obama said Friday he was confident he could gather a broad international coalition to defeat Islamic State extremists in Iraq and Syria, following two days of talks at the NATO summit, as Washington said it does not intend to cooperate with Iran over the terrorist group's threat.

"I leave here confident that NATO allies and partners are prepared to join in a broad, international coalition," Obama said after a meeting of the Western military alliance in Wales.

Following the beheading of two U.S. journalists by the Islamic State, which has overrun swathes of northern Iraq and Syria, Obama said there was "unanimity" among NATO members that the group "poses a significant threat."

Obama cautioned that "it's not going to happen overnight", but "we're going to achieve our goal.

"We're going to degrade and ultimately defeat ISIL (IS' previous name) the same way we've gone after al-Qaida," he said.

U.S. Secretary of State John Kerry will travel to the Middle East to seek support of regional powers, Obama said, insisting that Arab involvement was "absolutely critical."

The president added: "Our hope is the Iraqi government is actually formed and finalized next week. That, then, allows us to work with them on a broader strategy."

Meanwhile, a U.S. official said that Washington it has "no plans" for any military coordination with Iran in the fight against the IS.

"We are not going to coordinate military action or share intelligence with Iran and have no plans to do so," State Department deputy spokeswoman Marie Harf said, reacting to reports that Tehran had approved such an arrangement.

Kerry on Friday co-chaired with Britain a meeting of ministers from Australia, Canada, Denmark, France, Germany, Italy, Poland and Turkey in a bid to win support for the fight against IS.

IS caught the world by surprise when it made huge territorial gains and declared an Islamic "caliphate" in an area straddling Iraq and Syria countries.

The U.S. has conducted more than 100 air strikes in northern Iraq in recent weeks, allowing Kurdish and Iraqi forces to regain ground lost to the jihadists.

Other countries have provided humanitarian assistance and intelligence, while Germany and France are providing military equipment to Kurdish fighters battling IS in northern Iraq. 

Kerry stressed Friday that there would be "no boots on the ground" in the U.S. strategy against IS, but added that "there are many ways in which we can train, advise, assist, and equip."

He urged allies to consider how they could contribute so the U.S. could have a plan at the U.N. General Assembly meeting later this month.

European allies, while supportive of the U.S. initiative, are proceeding with caution.

Britain has left the door open to air strikes in Iraq, but Prime Minister David Cameron played down the prospect of any immediate action.

"This will take time, patience and resolve," he told reporters at the end of the summit.

"We will proceed carefully and methodically, drawing together the partners we need, above all in the region, to implement a comprehensive plan."

President Francois Hollande said France was ready to join a coalition against IS militants in Iraq, but warned it would not commit to actions in Syria that might aid President Bashar Assad.

German Foreign Minister Frank-Walter Steinmeier stressed the effort was at an early stage.

"We are at the beginning in dealing with a group which nobody has a strategy to deal with in the long run," he told reporters.

NATO Secretary General Anders Fogh Rasmussen said the military alliance was willing to help if there was a request from Baghdad, likely providing training and coordination with other countries' efforts against IS.

Rasmussen said he "warmly welcomed" efforts by the U.S. and its allies, adding: "I think the international community has an obligation to do all it can to stop this dangerous terrorist organization."

He said NATO nations had also agreed to exchange more information on foreign fighters returning from Iraq and Syria to Europe and the United States, due to fears they will carry out attacks on home soil.

Pressure to act has intensified since the executions by IS of two U.S. journalists in videos showing a militant speaking in British English and threats that a British hostage would be next.

Cameron said NATO leaders were "united in condemnation of these barbaric and despicable acts."

In a further reminder of the brutality in Iraq, Iraqi Kurdish forces and Shiite militiamen on Friday discovered mass graves containing 35 bodies after retaking the town of Sulaiman Bek from jihadists.