Syrian Kurdish officials say Turkish shelling has hit a prison holding Islamic State militants in northeastern Syria. Turkey has said the military intends to move 9 miles into Syria and that its operation will last until all "terrorists are neutralized".
"It isn't that U.S. officials didn't know about Turkey's concerns regarding the YPG/PKK", said Howard Eissenstat, associate professor of history at St Lawrence University.
Turkey aims to set up a "safe zone" inside Syria, where it can resettle numerous 3.6 million refugees it has been hosting.
Turkey has said it aims to push back Syrian Kurdish People's Protection Units, or YPG, which it considers terrorists for its links to a decades-long Kurdish insurgency within its own borders.
The series of U.S. statements contrasted sharply with wayward signals sent by Washington since Trump said last Sunday that he expected Turkish troops to begin attacking.
U.S. military officials denied accusations by lawmakers and policy analysts that the Trump administration had abandoned its allies.
He has insisted he will impose sanctions on Turkey if it acts irresponsibly. Republicans in the House of Representatives have vowed to do the same.
That threat was repeated by US Treasury Secretary Steven Mnuchin, who said the US will "shut down the Turkish economy" if Ankara goes too far.
A Kurdish police force in northern Syria says a vehicle bomb has exploded outside a prison where members of the Islamic State group are being held, but there was no word on casualties.
In a statement, the authority said the attack had caused successive waves of displacement from Dayrik also known as al-Malikiya at the Iraqi border to Kobane some 400 km to the west.
In this photo taken from the Turkish side of the border between Turkey and Syria, in Akcakale, Sanliurfa province, southeastern Turkey, the town of Tel Abyad can be seen inside Syria, Saturday, Oct. 12, 2019.
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At the same time, Trump is also pushing Ukraine to investigate any potential wrongdoing by the Bidens. Joe Biden is a leading contender for the Democratic nomination in the 2020 presidential election.
"Is it all simply because we are Kurds?".
Without elaborating, he said the United States was "going to possibly do something very, very tough with respect to sanctions and other financial things" against Turkey. "But the relationship is a battlefield relationship only", Kimmett told Al Jazeera.
"I have yet no indication that they are willing to stop", Esper admitted. "They didn't help us with Normandy".
The US says it has already plucked two of the most high-profile IS militants to have been captured and spirited them out of Syria.
USA lawmakers introduced more legislation on Friday seeking stiff sanctions on Turkey over the offensive, underscoring unhappiness from both Democrats and President Trump's fellow Republicans in Congress over his Syria policy.
Turkey intensified its air and artillery strikes in northeast Syria on Friday, escalating an offensive against Kurdish fighters that has drawn warnings and criticism from across the world.
ISIL also claimed responsibility in it first big attack since the Turkish offensive began.
People gather after a auto bomb exploded in the town of Qamishli, Syria. The necessary measures would have been taken to prevent U.S. mail from being hit.
However, it is unclear where for Trump the limit lies for sanctions.
Egypt called the emergency meeting to discuss what it called Turkey's "blatant aggression" against Syria's sovereignty.
Mnuchin said that he did not believe that the president's actions led to the current situation in the region.