The Turkish Prime Minister Ahmet Davutoglu said at a news conference that Turkey is about to tighten security over the country following the recent attack in Ankara. On Wednesday, a car bomb exploded at a military housing complex near the parliament building in the Turkish capital, killing 28 people.
"The only thing we expect from our U.S. ally is to support Turkey with no ifs or buts," Davutoglu told journalists after a five-hour security meeting.
Turkey insists that the Syrian Kurdish YPG battling Daesh in Syria was embroiled in the bombing and was backed by the outlawed Kurdistan Workers Party (PKK).
Washington doesn't take responsibility to confirm or deny Ankara's allegations towards YPG involvement in the bombing.
"If 28 Turkish lives have been claimed through a terrorist attack we can only expect them to say any threat against Turkey is a threat against them," Davutoglu added.
A row that could erupt between Turkey and the US may determine further state of affairs in the region as Washington continues to hold negotiations with Syrian ally Russia to implement a "cessation of hostilities".
On Friday, Obama and Erdogan had a phone call during which the US President expressed concern over the conflict in Syria and urged Ankara to exercise restraint, ceasing artillery strikes in the area.
The US State Department echoed Obama saying that the country will carry on backing Syrian militants, a possible reference to the YPG, that fight against Daesh in the region.