Iran has the capability to build a nuclear weapon and is prepared to reconsider its policy against pursuing one if faced with an existential threat, a top adviser to Iranian Supreme Leader Ali Khamenei has warned the rest of the world — especially Israel.

The comments from former Foreign Minister Kamal Kharrazi come days after Israel carried out waves of airstrikes hitting multiple Iranian military targets on Oct. 26, in response to Iran firing about 180 ballistic missiles at Israel on Oct. 1.