Turkiye’s top diplomat urged Washington to start nuclear talks with Iran in an interview broadcast on Wednesday, as US warships arrived in the region ahead of a possible strike over Tehran’s protest crackdown.

“It’s wrong to attack Iran. It’s wrong to start the war again. Iran is ready to negotiate on the nuclear file again,” Foreign Minister Hakan Fidan told Qatar-based Al-Jazeera television in English.

“My advice has always been to our American friends: close the files one by one with the Iranians. Start with the nuclear issue and close it. Then move on to the others.”

Fidan’s comments after a US naval strike force led by an aircraft carrier took up position in Middle Eastern waters, US Central Command said on Monday, without revealing its precise location.

Washington has not ruled out new military intervention against Tehran over its response to the protests.

Since Iran began its crackdown earlier this month accompanied by a nationwide internet blackout, US President Donald Trump has given mixed signals on intervention.

Nato member Turkiye, which shares a 530 kilometre border with Iran, has often expressed opposition to military operations targeting the Islamic Republic.

Last week, President Recep Tayyip Erdogan described the unrest in Iran as a “new test” for Tehran, pledging Turkey would “stand against any initiative” that would drag the region into chaos.

He said he hoped diplomacy and dialogue would help Iran get through this “trap-filled period”.

Speaking to Al-Jazeera, Fidan said the problems with Iran should be tackled individually.

“Do not treat them as a package. If you put everything together as one package, it will be very difficult for our Iranian friends to digest and truly process it,” he said.

“In some cases, it may even seem humiliating for them. It would be hard to explain not only to themselves but also to their leadership.”

The minister made similar comments on Friday, telling Turkiye’s NTV he had visited Tehran late last year, urging them to “take steps”, saying he believed an agreement with the US on the nuclear issue was “possible”.

“A friend tells the bitter truth and I said what needed to be said,” he said.

Fidan also urged Iran to build trust in the region.

“When I was in Iran two months ago, I was very frank with my Iranian friends. They need to build trust in the region,” he told Al-Jazeera.

“They need to pay attention to how they are perceived by regional countries”.