The White House has said negotiators are continuing to engage with the Iranians, who, it claimed, are “struggling to sort out their leadership situation” amid the war, Al Jazeera reports.

In a statement to US media, spokesperson Anna Kelly said Trump would only enter into an agreement with Iran that “puts US national security first”.

The White House’s statement comes after Trump threatened Iran on social media to “get smart soon” and sign a deal on nuclear issues.