By Yasmine Ghania and Ahmed TolbaDUBAI, Aug 28 (Reuters) - Iran condemned the United States' new economic sanctions on Friday as "state terrorism", while its supreme leader said he was banning acts that could harm "social cohesion" amid concern that more financial pain could spark unrest at home.With the war now at the six-month mark, and negotiations at an impasse, President Donald Trump's administration has stepped up efforts to cripple Iran financially, with what it has billed an "economic D-Day".

Iran's president insisted on Wednesday that the United States would achieve nothing with its new sanctions campaign after Washington laid out plans to collapse the country's…

Iran's economy is poised for more instability as the Trump administration tries to coerce other countries into ending all financial dealings with the Islamic Republic