"I break the good news to all Iraqis that the Iraqi people have completed purging the Jazira region from Daesh and have completely controlled the border with Syria," al-Abadi said.
"This is a victory not only for Iraqis, but for Arabs, Muslims and the world," the premier added at a conference in Baghdad.
With this breakthrough, Iraq has completed "liberation of all its lands" from the Daesh more than three years after the terrorist group had seized large chunks of the country in a blitz, chief of the campaign, Lieutenant General Abdul-Amir Yarallah said in a press statement.
Last month, Baghdad announced that it had driven Daesh from Rawa, the last Iraqi town near the Syrian border that was held by the terrorist group, which has recently lost large swathes of territory in Syria and Iraq.