President Donald Trump opens the UN Security Council meeting

Donald Trump has chairing a United Nations Security Council meeting - a first for the US president.

It means that most of the attention that would have been focused on events at the General Assembly - where UK Prime Minister Theresa May would later defend the Brexit vote - was instead focused on the UN's most powerful body, where the US currently holds the rotating presidency.

While the meeting of the council addressed the issue of nonproliferation of nuclear, chemical and biological weapons, Mr Trump himself used the platform to attack Iran and accuse China - but not Russia - of meddling in 2018 midterm elections.

On Tuesday, during an unabashedly "America First" speech, Mr Trump said Iranian leaders "sow chaos, death and destruction" and "spread mayhem across the Middle East and far beyond." His national security adviser, John Bolton, also warned that there would be "hell to pay" if Tehran crossed the US, its allies or their partners.

Iranian President Hassan Rouhani responded by accusing the Mr Trump administration of violating the rules of international law and "state obligations" by withdrawing from the 2015 nuclear deal that Iran signed with the US and five other major powers.

Iran parliament reacts after Trump's withdrawal from nuclear deal Show all 10 1 /10 Iran parliament reacts after Trump's withdrawal from nuclear deal Iran parliament reacts after Trump's withdrawal from nuclear deal Iranian MPs burnt a US flag in parliament after Donald Trump announced America's withdrawal from the nuclear deal. AFP/Islamic Consultative Assembly News Agency Iran parliament reacts after Trump's withdrawal from nuclear deal US President Donald Trump displays a presidential memorandum after announcing his intent to withdraw from the JCPOA Iran nuclear agreement in the Diplomatic Room at the White House. Reuters Iran parliament reacts after Trump's withdrawal from nuclear deal Some Iranian MPs reacted after Trumps decision by shouting 'death to America'. AFP/Islamic Consultative Assembly News Agency Iran parliament reacts after Trump's withdrawal from nuclear deal Iranian lawmakers prepare to burn two pieces of papers representing the US flag and the nuclear deal. AP Iran parliament reacts after Trump's withdrawal from nuclear deal Iran said it will hold talks with signatories to the nuclear deal after Trump's decision to withdraw from the accord, which it branded "psychological warfare". AFP/Islamic Consultative Assembly News Agency Iran parliament reacts after Trump's withdrawal from nuclear deal Several Iranian MPs stood chanting in the Tehran parliament. AFP/Islamic Consultative Assembly News Agency Iran parliament reacts after Trump's withdrawal from nuclear deal Iranian MPs burning a US flag AFP/Islamic Consultative Assembly News Agency Iran parliament reacts after Trump's withdrawal from nuclear deal President Hassan Rouhani addressed the nation in a televised speech in Tehran. He said he'd send his foreign minister to negotiate with countries remaining in the nuclear deal after Trump's decision to pull America from the deal, warning he otherwise would restart enriching uranium "in the next weeks." Iranian Presidency Office via AP Iran parliament reacts after Trump's withdrawal from nuclear deal Iran's press condemned Trump's withdrawal from a multi-party nuclear deal but was divided over whether Tehran should react with patience or withdraw itself. AFP Iran parliament reacts after Trump's withdrawal from nuclear deal Trump announced the US withdrawal from what he called the "defective" multinational nuclear deal with Iran, and said Washington would reinstate sanctions against the Islamic republic. AFP/Getty

Mr Rouhani did not to attend the Security Council meeting that. The council is populated by five permanent members -- the US, China, Russia, Britain and France -- and 10 other member states, who occupy a council seat for two-year terms. Iran is not among them.

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