The EU expressed its frustration in a written statement that the Kurdistan Regional Government (KRG) ignored calls to cancel Sunday's independence referendum.

"The EU has consistently confirmed its full support for the unity, sovereignty and territorial integrity of Iraq. It therefore appealed for the referendum not to be held in this unilateral manner, and especially not in disputed areas. It regrets that these calls have not been heeded."

The statement added that the EU appeals to all parties to exercise calm and restraint and to make a renewed commitment to resolve all pending issues across the political and economic spectrum through peaceful and constructive dialogue leading to a mutually agreed solution within the framework of the Iraqi constitution.

"Iraqi unity remains essential in order to face the remaining threat posed by Daesh, the daunting task of reconstruction in the liberated areas, and the essential challenge of building a stable, secure, inclusive and prosperous Iraq in the interest of all Iraqi people. The EU stands ready to support such a dialogue," the statement said.