Iran's supreme leader warned Sunday that any attack by the United States would spark a "regional war" in the Mideast, further escalating tensions as President Donald Trump has threatened to militarily strike the Islamic Republic.

Onetime allies, the United States and Iran have seen tensions escalate repeatedly in the four decades since the Islamic Revolution.

The U.S. Virtual Embassy Iran is telling American citizens who are still in the country to leave immediately. The warning Tuesday comes as more than 2,000 people have been killed in the ongoing anti-government demonstrations, according to an activist group.

The recent wave of protests in Iran constitutes one of the most significant developments in the history of the Islamic Republic. Although the Iranian authorities imposed an internet blackout to contain the flow of information,

Reports circulating in multiple outlets say the United States could carry out strikes on Iran within the next forty eight hours, News.Az