- Iran's Revolutionary Guard Corps has warned it will change the weapons and geography of the war if president Donald Trump launches new strikes.
- The threat follows a rapid advance by Iran-backed Houthi forces aiming to seize strategic heights and isolate the Red Sea coast in Yemen .
- Trump reportedly called off planned airstrikes against the Houthis at the last minute as weapons were being loaded onto aircraft.
- The proposed military action came after pleas for US assistance from the Saudi crown prince and Yemen's internationally recognised president, Rashid al-Alimi.
- Trump had earlier warned that he would blow the entire region up if Iran did not comply with his demands.
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