"It's a little more of the same," Trump said.
"In the meantime, we're going to be hitting them very hard because it's our turn to hit them."
The flare-up across multiple fronts threatens to reignite an all-out war and further complicates efforts to end the five-month conflict.
In response to the regional escalations, oil markets saw Brent crude futures shift, rising 7.3 percent to $88.09 a barrel before easing back to $89.78.
The office of Iraqi President Nizar Amidi condemned the joint US-Saudi strikes on eastern Iraq, labeling the action a blatant violation of national sovereignty.
Concurrently, Saudi defense officials informed US leaders that while they sought to deter proxy attacks on critical infrastructure, Riyadh favored de-escalation and a return to diplomatic negotiations between Washington and Tehran.
