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.