For months, Ankara had been reluctant to join the U.S.-led coalition against IS despite gains made by the extremist group on Turkey’s doorstep.

Now, Turkish warplanes are directly targeting IS locations — the latest bombing run coming early Saturday for a second straight day. Turkey then opened a second front on Kurdish rebel sites.

The strikes against the Kurdistan Workers’ Party, or PKK, muddle the US-led fight against IS.

The Turkish jets hit shelters and storage facilities belonging to the PKK in seven areas in northern Iraq, including Mount Quandil where the group’s headquarters are located, authorities said. It was Turkey’s first aerial raid in northern Iraq against the PKK since Turkey embarked on peace talks with the Kurds in 2012. The PKK declared a ceasefire in 2013.

The United States has relied on Syrian Kurdish fighters affiliated with the PKK while making gains against IS.

But this morning the White House says Turkey has the right to defend itself against terrorist attacks by Kurdish rebels.

White House spokesman Alistair Baskey is strongly condemning what he calls recent terrorist attacks by the PKK, which the US has designated a terrorist group. He’s also pointing out that Turkey is a NATO ally of the US.

Baskey says the PKK should renounce terrorism and resume talks with Turkey’s government. But he also says that both sides should avoid violence and pursue de-escalation.

Ancient enemies

The attacks against PKK positions in Iraq comes amid signs of trouble in the peace process, with Turkey accusing the Kurdish rebels of not keeping a pledge to withdraw armed fighters from Turkey’s territory and to disarm. Turkey is also concerned that gains made by Kurds in Iraq and in Syria could encourage its own minority to seek independence.

Tensions have been flaring with the Kurds in recent days following the IS suicide bombing in the south-eastern city of Suruc on Monday. Kurdish groups have blamed the government for not doing enough to prevent IS operations. On Wednesday, the PKK claimed responsibility for the killing of two policemen in the Kurdish majority city of Sanliurfa.

The PKK said the strikes spelled the end of the peace process aimed to end three decades of conflict in Turkey’s mainly-Kurdish southeast that has killed tens of thousands of people.

“Turkey has basically ended the ceasefire,” Zagros Hiwa, a PKK spokesman, told The Associated Press.

Turkey’s pro-Kurdish party, the People’s Democratic Party, also said the strikes amounted to an end of the two-year-old truce. It called on the government to end the bombing campaign and resume a dialogue with the Kurds.

Home front

While conducting raids, Turkey has simultaneously been clamping down on suspected IS and PKK militants and other groups inside the country. Prime Minister Ahmet Davutoglu said Saturday nearly 600 suspects were detained in two days of raids in 22 provinces.

“Turkey’s operations will, if needed, continue until the terror organisations’ command centres, all locations where they plan (attacks) against Turkey and all depots used to store arms to be used against Turkey are destroyed,” Davutoglu said.

In other attacks, seven police officers were wounded after suspected PKK militants hurled a small bomb at a police station in Bismil, near the mainly Kurdish city of Diyarbakir, the Dogan news agency reported Friday.

On Friday, three F-16 jets struck Islamic State targets that included two command centres and a gathering point near the Turkish border in Syria. The Syrian Observatory for Human Rights said nine Islamic State militants were killed in the raids. The extremists have yet to comment on the strikes.

The Syrian government has so far refrained from commenting on Turkish strikes inside Syrian territory, but Syria’s main political opposition group, which is backed by Ankara, welcomed Turkey’s move.

Power balance

Turkey’s shift in policy toward the fight against IS also comes amid closer cooperation between Iran and the US following a recent nuclear agreement. An analyst said the agreement threatened to lessen Turkey’s strategic importance, prompting it to cooperate with the US-led coalition against the extremists.

Turkey launched the raids on the IS following a suicide bombing by the extremist group, which killed 32 people, and an IS attack on Turkish forces, which killed a soldier. It also declared that it had reached an agreement with Washington to open up its southern air bases to coalition aircraft, giving itself a frontline role in the fight against IS.

Fadi Hakura, a Turkey analyst at Chatham House in London, said Turkish leaders feared that the increased cooperation between Iran and Washington in the battle against IS would sideline Turkey from US calculations, providing one impetus to allow U.S. fighter jets to use Turkish air bases near the Syrian border.

In addition, Islamic State has grown substantially more powerful in the last year, and controls a wider swath of the Turkey-Syria border, leading Turkish intelligence to change its assessment so that it now views the militant group as an imminent threat to Turkish security, said Hakura.

“The use of the Turkish air base is extremely important,” he said. “Before, the US had to traverse 1000 miles to target IS in Syria. Now it will be much less, so naturally the air campaign will be far more intense and far more effective.”