A U.S. official said that six American warplanes dropped a dozen 30,000-pound bunker-busters on the Fordo nuclear site, and that Navy submarines fired 30 cruise missiles at the Natanz and Isfahan sites. One B-2 bomber also dropped two bunker-busters on Natanz, the official said.

The rise in prices came after President Trump said he had "obliterated" Iran's main nuclear sites in strikes over the weekend.

It was an unprecedented attack years in the making, with some last-minute misdirection meant to give the operation a powerful element of surprise.