In a post on Truth Social on Tuesday, Trump warned of catastrophic consequences amid escalating tensions in the Middle East, saying, "I don't want that to happen, but it probably will."

He also hinted at the possibility of "complete and total regime change" in Iran, suggesting that "different, smarter, and less radicalized minds" could reshape the country's future, adding, "maybe something revolutionarily wonderful can happen, WHO KNOWS?"

The remarks drew a strong response from the IRGC, which said any US move perceived as crossing Iran's strategic thresholds would trigger retaliation not limited to the region.

The warning signals a potential expansion of conflict beyond the Middle East, raising global security concerns.

Iranian officials did not specify what actions would constitute crossing these "red lines," but the timing of the statement suggests it is directly linked to Trump's escalating rhetoric.

Analysts say Tehran is attempting to deter Washington by signalling readiness for a broader and potentially unconventional response.

The exchange marks a sharp escalation in tone between the two sides, with both signalling willingness to harden positions.

Trump's comments on possible regime change are likely to further inflame tensions, as Iran has historically viewed such rhetoric as a direct threat to its sovereignty.

Security experts warn that phrases like "beyond the region" could include cyber operations, attacks on global assets, or actions through allied networks, significantly widening the scope of confrontation.

With both sides trading stark warnings, fears of miscalculation are growing. Regional players have repeatedly called for restraint, but the latest statements suggest the crisis may be entering a more volatile phase.