President Donald Trump announced what he described as the "most crushing economic operation ever" against Iran on Wednesday, vowing "economic warfare and isolation on an unprecedented scale."

In a Truth Social post, Trump stated that Iran had failed to seize the opportunity to reach a deal and would now face severe measures. He warned that any country providing financial, business, airport, or government support to Iran would encounter "tremendous economic consequences."

The announcement comes amid ongoing efforts to resolve a war involving the United States and Israel that began nearly six months ago. Talks to end the conflict have stalled, prompting the escalation in economic pressure.

Trump's move revives elements of a maximum pressure strategy aimed at collapsing Iran's economy through broad sanctions and secondary penalties on trading partners. Details on specific actions remain limited at this stage.

Iranian state media responded by dismissing the threats as psychological warfare and propaganda. China, which accounts for the majority of Iran's oil exports, has not issued an immediate public reaction.

The development marks a sharp turn after earlier signals of potential diplomacy, highlighting the administration's determination to isolate Tehran economically.