Turkey is determined to clear its border with Syria of militants and assure the security of the country, Foreign Minister Mevlut Cavusoglu said on Monday, after the announcement came out from White House saying Ankara will soon launch an offensive into northern Syria.

"Since the beginning of the crisis in Syria, we supported the country's territorial integrity, and we will continue to do so from now on," Cavusoglu said. "We will contribute to peace and stability in Syria," he said in a tweet.

On Sunday, the White House press secretary said Turkey will soon move forward with its long-planned military operation to create what it calls a "safe zone" in northern Syria and U.S. forces will not "support or be involved in it."

The announcement was made following a phone call between Turkish President Recep Tayyip Erdogan and U.S. President Donald Trump, during which the former has expressed his frustration towards failure of U.S. military and security officials to implement the agreement between the two countries.

Erdogan also reiterated the necessity of the safe zone to eliminate the threats from the Syrian Kurdish YPG militia, which Ankara considers a terrorist organization, and to create the conditions necessary for the return of Syrian refugees, it said.

"The United States Armed Forces will not support or be involved in the operation, and United States forces, having defeated the ISIS (ISIL) territorial 'Caliphate,' will no longer be in the immediate area," it added.

According to the White House official, Turkey is set to take custody of foreign fighters captured in the U.S.-led campaign against ISIL, who have been held by Kurdish forces supported by the U.S.

"The United States will not hold them for what could be many years and great cost to the United States taxpayer," press secretary Stephanie Grisham said in a statement.

France, Germany, and other European nations have refused U.S. requests to take back nationals who fought for ISIL.

It was not clear whether that meant the United States would withdraw its 1,000 or so troops completely from northern Syria.

(With input from Reuters)