Turkish and US officials chose to meet to work on resolving a diplomatic crisis between the two North Atlantic Treaty Organisation allies and talks between the two countries' foreign ministers were constructive, Deputy Prime Minister Bekir Bozdag said on Thursday.
Ambassador Bass said the decision to suspend visas was a hard one for the State Department.
Meanwhile, the U.S. special delegation is expected to visit Turkey next week aiming to resolve the crisis between the two countries which erupted following the arrest of an employee of the U.S. Consulate General in Istanbul, according to the diplomatic sources. Turkish state television has reported, however, that the US Ambassador has met with Ankara's Foreign Ministry representatives on Wednesday.
In response, Washington halted issuing non-immigrant visas from its missions in Turkey, prompting Turkish missions in the U.S. to hit back with a tit-for-tat move.
The spat erupted after Turkey arrested a Turkish national working with the USA consulate general in Istanbul last week over alleged link to the network led by the US -based Turkish cleric Fetullah Gulen, who is accused by Ankara of masterminding a coup attempt previous year.
On Tuesday, a Pentagon spokesman said the spat had not affected North Atlantic Treaty Organisation or USA military ties with Turkey.
Wednesday's telephone call between Tillerson and Turkey's top diplomat Mevlut Cavusoglu came after the US ambassador to Turkey said Tillerson held talks to try and resolve a major diplomatic break between the two North Atlantic Treaty Organisation allies.
In response, the United States suspend non-immigrant visa services there. The U.S. embassy stated earlier that it was "deeply disturbed" over the arrest and rejected the allegations against the employee as "wholly without merit".
Ankara wanted to open a new page in relations with the USA under President Donald Trump but a spate of issues have raised tensions, including the U.S. refusal to extradite Gulen and American support for Kurdish militias in Syria.
Metin Topuz was arrested last week over alleged links to the network of USA -based cleric Fethullah Gulen, accused by Ankara of orchestrating last year's coup attempt.
In addition, Ankara's rapprochement with Russian Federation and purchase of S-400 missiles become the subject of criticism by the U.S.