Iran's supreme leader, Ayatollah Ali Khamenei has threatened to retaliate against the United States if it renewed economic sanctions against his country for another 10 years. He said in a televised speech that the US should be aware that the Islamic Republic of Iran will not stand idly. <br/><br/>Mr Khamenei, who has final say on all state matters, said the renewal is a violation of a landmark nuclear deal with world powers that capped Iran's nuclear activities in return for lifting sanctions.<br/><br/>The warning came days after the US House of Representatives voted to renew the Iran Sanctions Act for 10 years. The act is set to expire at the end of this year. <br/><br/>The House bill must be approved by the Senate and signed by President Barack Obama if it is to become law. The sanctions ban businesses from investing in Iran, specifically its oil industry.