France said Friday that it “needs no permission” to work towards easing tensions between Iran and the US, after President Donald Trump accused his French counterpart Emmanuel Macron of meddling in the dispute.

“On Iran, France speaks with complete sovereignty. It is working hard for peace and security in the region, it is working to facilitate a de-escalation in tensions and it needs no permission to do so,” Foreign Minister Jean-Yves Le Drian said in a statement.

In a tweet Thursday, Trump claimed that Iranian officials want “desperately to talk to the US, but are given mixed signals from all of those purporting to represent us, including President Macron of France.”

“I know Emmanuel means well, as do all others, but nobody speaks for the United States but the United States itself. No one is authorized in any way, shape, or form, to represent us!” he said. Le Drian said the worsening tensions between Tehran and Washington called for initiatives to try to restore dialogue.

“That’s what President Macron is doing, in full transparency with our partners, above all our European partners,” he said, adding that Macron was “obviously keeping American authorities informed”.

Trump has reimposed crippling sanctions on Iran after pulling out of an international deal aimed at curbing the country’s nuclear ambitions. But the European partners to the accord, including France, have resisted his attempts to isolate the Iranians. Macron continues to speak regularly by telephone with Iranian President Hassan Rouhani.

Any external presence in Gulf ‘source of insecurity’ for Iran: Iranian Foreign Minister Mohammad Javad Zarif said on Twitter on Friday any maritime presence in the Gulf from outside the region would be a “source of insecurity” for Iran, and Tehran would act to safeguard its security.

“(The) Persian Gulf is a vital lifeline and thus nat’l security priority for Iran, which has long ensured maritime security,” Zarif said in his tweet. “Mindful of this reality, any extra-regional presence is by definition (a) source of insecurity ... Iran won’t hesitate to safeguard its security.” Zarif’s comments came after U.S. efforts to set up a maritime coalition with international partners to secure shipping in the Gulf amid rising tensions with Iran in the strategic waterway.