Trump said in a social media post that he made the move after a breakthrough in negotiations, and that significant points under discussion "have been brought to the highest level of Iranian leadership and approved."

President Donald Trump said in a social media post that the U.S. would hit Iran "VERY HARD TONIGHT" and would "assume total control" of Iran's oil and gas industries, including the key Kharg Island oil terminal, in the "not too distant future."

In a statement posted to social media, U.S. Central Command said the strikes would be "a proportional response to unjustified Iranian aggression."

Trump said in a social media post that military officials told him "the Iranians shot down one of our highly sophisticated Apache Helicopters." He added that both service members "are safe and uninjured."

Israel and Iran traded fire Monday in their first attacks since the U.S. struck a ceasefire with Tehran two months ago.