President Donald Trump accused Tehran of being "the number one provocateur of terror" (Picture: PA).
US President Donald Trump has again warned Iran not to threaten American interests.
Speaking to reporters on the White House lawn, President Trump accused Tehran of being "the number one provocateur of terror", adding any move against the US "will be met obviously with great force".
This latest warning comes amid heightened tensions between the US and Iran, following the US President's decision a year ago to pull out of Iran's nuclear deal with world powers.
President Trump's most recent comments come after he said Iran would face its "official end" if it fights the US.
He dismissed reports that he was ready to send 120,000 US troops to Iran in the event of an attack as "fake news", but warned he would send "a hell of a lot more troops than that" if it happened.
The US recently sent an aircraft carrier and bombers to the Persian Gulf, to counter what it says is a growing threat from Iran.
Last week, Britain raised the threat level for UK forces and diplomats in Iraq because of an increased risk from Iranian-backed militants.
There are around 1,400 UK military and civilian personnel supporting counter-Daesh, otherwise known as so-called Islamic State, operations in Iraq.