US President Donald Trump warned Tuesday of unspecified “very strong action” if Iranian authorities go ahead with threatened hangings of some protesters, with Tehran calling American warnings a “pretext for military intervention”.

International outrage has built over the crackdown that a rights group said has likely killed thousands during protests posing one of the biggest challenges yet to Iran’s clerical leadership.

Iran’s UN mission posted a statement on X, vowing that Washington’s “playbook” would “fail again”.

“US fantasies and policy toward Iran are rooted in regime change, with sanctions, threats, engineered unrest, and chaos serving as the modus operandi to manufacture a pretext for military intervention,” the post said.