The US' decision to put Iran "on notice" after the nation test-fired a medium-range ballistic missile has reportedly been dismissed by a top aide to Iran's Supreme Leader as "useless" and the actions of "an inexperienced person".

Ali Akbar Velayati, who advises Ayatollah Ali Khamenei on foreign affairs, spoke out after it was confirmed that the country had been "put on notice" by saying it was "not the first time that an inexperienced person has threatened Iran".

He told the Iranian news agency Fars: "This is not the first time that an inexperienced person has threatened Iran ... the American government will understand that threatening Iran is useless."

"Iran does not need permission from any country to defend itself", he added.

It comes after White House National Security Adviser, Michael Flynn announced the US was officially putting Iran on notice - a threat which has since been confirmed by US President Trump on Twitter.

According to the US Sunday's missile test by Iran "was in defiance of a UN Security Council resolution" and a sign of "destabilising activity".

Iranian officials have said the missile test was carried out solely for defensive purposes.