Vehicle bombing in Baghdad Shiite district kills 11 people

US Defence Secretary Ash Carter has announced the deployment of additional troops to support Iraqi forces in the fight against ISIS.

A small contingent of US Special Forces are reported to have landed at the airfield to work with Iraqi troops for the next stages of the operation.

In light of Iraqi security forces' recent advances, the release said, the defense secretary announced that the United States, in close coordination with the Iraqi government, will deploy an additional 560 troops to Iraq to build on that momentum.

The announcement, which will bring the total authorised number of American military personnel in Iraq to more than 4,600, came two days after Baghdad announced the recapture of a base south of Mosul that is seen as an important step toward the eventual battle for the city.

US commanders plan to use the base, Qayara Airfield West, as a staging area to provide logistical support to Iraqi forces as they try to retake Mosul.

Iraqi government forces deployed across Baghdad on Monday, closing off main roads and snarling traffic. In addition to the capture of the airbase at Qayyarah, Iraqi forces backed by coalition air power and other support recently freed the city of Fallujah from ISIL's control after previous gains in Ramadi, Hit and Rutbah, according to the release.

However, there is still debate in Washington about the timing of a move on Mosul.

Carter said the troops would also help Iraqi security forces in planning to encircle and eventually retake the key city, Mosul. Carter told reporters ahead of Monday's trip that the United States would now help turn Qayara into a logistics hub.

And as Islamic State militants have lost part of their self-proclaimed caliphate in Iraq and Syria, they increasingly have turned to suicide attacks.

Iraqi forces were already improving the base's perimeter in case of a counterattack from the nearby town of Qayara, which Islamic State militants still hold, another USA official in Baghdad said.

No group immediately claimed responsibility for the attack, but it bore the hallmarks of the Islamic State group.

Suicide bombings like the one in Baghdad on July 3 that killed almost 300 people, one of the largest attacks since the U.S.-led invasion that toppled Saddam Hussein 13 years ago, suggest the group could remain a long-term threat.

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