Donald Trump's administration has imposed sanctions on Iran following its recent ballistic missile test.

The sanctions target 13 people and 12 companies, including groups in China, Lebanon and the United Arab Emirates.

President Trump tweeted earlier: "Iran is playing with fire - they don't appreciate how 'kind' President Obama was to them. Not me!"

Iran called the threats from "an inexperienced person" useless, vowing to impose reciprocal measures.

John Smith, the US Treasury Department's acting sanctions chief, said in a statement on Friday: "Iran's continued support for terrorism and development of its ballistic missile programme poses a threat to the region, to our partners worldwide and to the United States."