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Business · Global trade · published 2026-08-23 · via Fortune

U.S. to unveil sweeping Iran sanctions; Tehran threatens 'seismic' response

Iran's top security official warned that any foreign support for new U.S. economic measures would be treated as an act of war. Treasury Secretary Scott Bessent is expected to announce the sanctions on Monday, following U.S. vows of unprecedented isolation. Iran's president defended a recent interim agreement as the best path forward, while attacks near the Strait of Hormuz have eased but tensions remain high.

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The 60-day negotiation window opened by the interim memorandum expired without visible progress, leaving both governments in a holding pattern. Iran's president insists the agreement contains no concessions, while Washington prepares fresh economic pressure through Treasury Secretary Bess

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This summary is Al-enhanced to contain extended analysis and broader social context. The original is {NAME); the linked article is the authoritative source. Original headline: “As Trump administration readies economic warfare measures against Iran, top security official vows retaliation ‘in a seismic manner’.” Browse more stories.