Relations between Washington and Ankara have been strained, in part due to US support for the Syrian Kurdish People's Protection Units (YPG).

"Our trust is damaged. We have to mend our trust. The contacts between us are important," Mevlut Cavusoglu, the Turkish foreign minister said in an interview with TGRT Haber.

"When (US Secretary of State Rex) Tillerson comes we will share these ideas with him sincerely, we will share our expectations," he said.

Turkish media had earlier reported that Tillerson and US National Security Advisor HR McMaster would both visit Turkey soon, although Cavusoglu did not specify when.

Two weeks ago, Ankara launched Operation Olive Branch in the northern Syrian region of Afrin, fighting the YPG militia, which Turkey considers a terror group.

The YPG also controls the key strategic town of Manbij to the east and then a long strip of territory east of the Euphrates up to the Iraqi border.

"The United States should understand and meet our concerns," Cavusoglu said. "You are cooperating with this terror organization, knowingly. And this poses a threat to us."

On Sunday, Turkey threatened to expand its military operation against Kurdish militia in the Syrian town of Manbij.

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