US President Donald Trump warned of economic consequences against any country that provided "any type of lifeline to Iran" as the US looks to resolve a war it began alongside Israel nearly six months ago.

The announcement extends a pressure campaign the Trump administration has waged since April under the banner Operation Economic Fury.

US president announces 'causing economic operation' against Iran, vows measures against nations trading with Tehran.

Donald Trump warned countries providing Iran any financial, business or government support that they could face ‘tremendous economic consequences’.