Iranian officials warn Trump not to cross ‘red line’ over threats to intervene in protests

US president's posts that US will come to the rescue of protesters prompts warnings of regret-inducing response'

Donald Trump has threatened to intervene in Iran if its government killed demonstrators, prompting warnings from senior Iranian officials that any American interference would cross a red line".

In a social media post on Friday, Trump said that if Iran shoots and kills protesters, the US would come to their rescue". He added: We are locked and loaded, and ready to go", without explaining what that might mean in practice.