On Tuesday, Washington condemned the killing of two Turkish police officers in an attack in the Azaz region in northern Syria, where Turkish forces are deployed within the Euphrates Shield operation.
The US State Department condemned the cross-border attacks against "NATO ally Turkey" and offered its condolences to the families of the Turkish policemen.
This came in a press conference for Foreign Ministry spokesman Ned Price, in which he said, "Turkey is an important ally for us in NATO and we have common interests in many areas."
The attack took place last Sunday, and Turkey has blamed the Kurdish People's Protection Units (YPG), which Ankara considers a terrorist organization.
"We condemn the cross-border attack against our NATO ally Turkey," Price said.
He stressed the need for all parties to abide by the ceasefire in the designated areas in Syria, in order to enhance efforts for stability and a political solution in the country.
"We will continue to consult closely with Ankara on the Syrian policy," he added.
Turkish President Recep Tayyip Erdogan described the attack as "the straw that broke the camel's back".
Turkey said the YPG carried out the attack via a guided missile.
The Turkish president stressed the country's determination to eradicate the threats emanating from northern Syria.