It was an executive order signing ceremony that lacked one crucial part - the signature.

Donald Trump was scheduled to sign off on a pair of directives in the Oval Office on Friday - but walked out of the room before actually signing them.

With the papers laid out on the desk ready for his signature, Mr Trump was asked by a reporter about his former national security adviser Michael Flynn, who is seeking immunity before testifying before congressional committees about Russia's alleged meddling in the presidential election.