National security advisor

White House: 'We are officially putting Iran on notice'

Without elaborating, Michael Flynn told White House reporters: "As of today, we are officially putting Iran on notice."

Washington earlier declared the test to be "absolutely unacceptable".

Iran confirmed on Wednesday it had tested a missile over the weekend, but denied violating a UN Security Council resolution.

Mr Flynn did not provide any further details of what actions the US may be planning in response to the test, which Pentagon officials say failed upon re-entry into the earth's atmosphere.

Trump offers national security job to controversial ex-general

It was not immediately clear if Flynn accepted.

Flynn, 57, was a top adviser and high-profile surrogate to Trump during his campaign, introducing the President-elect at rallies and serving as a top cheerleader on his hyper-active Twitter feed.

His potential appointment wouldn't require Senate confirmation, which is potentially helpful for Trump, as Flynn has a long history of controversial remarks and was fired as President Barack Obama's director of the Defense Intelligence Agency in 2014.