Last week, Turkish authorities detained scores of people for suspected links to the Kurdistan Workers Party (PKK), which is viewed as a terrorist group by Ankara, Brussels, and Washington.

On Feb. 18, Interior Minister Ali Yerlikaya said that almost 300 suspects had been arrested in multiple provinces, including Istanbul and the capital Ankara.

“We are determined to eradicate terrorism in all its forms,” Yerlikaya said in remarks cited by Turkey’s official Anadolu news agency.

Iranian forces unleashed drone and artillery attacks on the Kurdistan region of northern Iraq on Monday, targeting what Tehran said were bases of militant Iranian Kurdish separatist groups there, according to a semiofficial news agency.

The attacks by the powerful Iranian Revolutionary Guard Corps were the second in three days against Iranian militants based in Iraq, according to the Tasnim news agency, which is affiliated with the Revolutionary Guards.

Vice President Mike Pence made an unannounced visit to Iraq on Saturday in the highest-level American trip since President Donald Trump ordered a pullback of U.S. forces in Syria two months ago.

Flying in a C-17 military cargo jet to preserve the secrecy of the visit to the conflict zone, Pence landed in Erbil to meet with Iraqi Kurdistan President Nechirvan Barzani. The visit was meant to reassure the U.S. allies in the fight against the Islamic State after Syrian Kurds suffered under a bloody Turkish assault last month following the Trump-ordered withdrawal.

SEA ISLAND, Georgia — John Kelly, the former White House chief of staff, is calling President Trump’s decision to remove American troops from northern Syria a “catastrophically bad idea” that is harming U.S. national security and boosting Russia’s influence in the Middle East.

A video has surfaced showing residents of a Syrian town near the border of Turkey throwing rotten fruits and rocks at U.S. troops during their withdrawal.

The video, posted by Kurdish agency Hawar News, shows a people throwing the objects at a vehicle that appears to be a Mine-Resistant Ambush Protected Oshkosh M-ATV. The events unfolded in the town of Qamishli.

SHEIKHAN, Iraq—Civilians in Kurdish areas hurled rotten fruit and insults at a convoy of U.S. military vehicles that crossed from northern Syria into Iraq early Monday, marking a dramatic drawdown to an American presence in Syria to combat Islamic State.

QAMISHLI, Syria — A long convoy of United States troops crossed into Iraq from Syria early Monday, accelerating a withdrawal of American forces from northern Syria that set the stage for the Turkish invasion of Kurdish-controlled land.

When Fox News’ Trish Regan first reported President Donald Trump’s October 9 letter to Turkish President Recep Tayyip Erdoğan, some journalists and pundits wondered whether it was a joke or a hoax. But the White House confirmed: It was genuine.

“History will look upon you favorably if you get this done the right and humane way. It will look upon you forever as the devil if good things don’t happen. Don’t be a tough guy. Don’t be a fool!” Trump wrote, signing off incongruously, “I will call you later.”

Withdrawing U.S. forces from Syria is a grave strategic mistake. It will leave the American people and homeland less safe, embolden our enemies, and weaken important alliances. Sadly, the recently announced pullout risks repeating the Obama administration’s reckless withdrawal from Iraq, which facilitated the rise of the Islamic State in the first place.

Since the 9/11 terrorist attacks, I have worked with three presidential administrations to fight radical Islamist terrorism. I have distilled three principal lessons about combating this complex threat.

Turkish President Recep Tayyip Erdogan on Saturday promised to "crush the heads" of the Kurds in Syria if they don't fall back from the border's safe zone, according to reports.

The threat comes as both Turkey and the Kurdish-led Syrian Democratic Forces (SDF) claim the other is violating terms of a 120-hour cease-fire brokered by Turkey and the U.S. on Thursday.

Violence continued in northeast Syria despite the five-day peace agreement, a source told Fox News.