The U.S. launched fresh strikes on Iran, after President Donald Trump said earlier in the day he may no longer be interested in negotiating a deal.

Oil prices added to the cautious tone after the U.S. started a "series of powerful strikes" against Iran on Tuesday evening.

U.S. strikes on Iran after Strait of Hormuz ship attacks pushed oil above $72, weighed on Dow futures and threatened a fragile ceasefire.