伊拉克总理宣布对摩苏尔的攻势开始

Iraqi Prime Minister Haider al-Abadi has announced the formal start of a military push to drive Islamic State extremists from the northern stronghold city of Mosul.

The announcement on state television early Monday signals the opening of the largest military operation in that country since U.S. forces left five years ago.

U.S. Defense Secretary Ash Carter said this is a "decisive moment" in the campaign to defeat Islamic State and pledged support from the U.S.-led coalition.

"We are confident our Iraq partners will prevail against our common enemy and free Mosul and the rest of Iraq from ISIL's hatred and brutality," he said in a statement.

In the hours before the announcement, the Iraqi Air Force dropped thousands of leaflets on Mosul, warning residents of the coming offensive to liberate the city.