(FOX NEWS) — War Secretary Pete Hegseth said that Iran does not have so-called “kamikaze dolphins” — dismissing an unusual claim that emerged from recent reporting on Iran’s potential tactics in the Strait of Hormuz.

“I can’t confirm or deny whether we have kamikaze dolphins, but I can confirm they don’t,” Hegseth said during a Pentagon briefing Tuesday.

The question stems from a Wall Street Journal report that said Iranian officials have at least discussed reviving a Cold War-era program involving trained dolphins capable of carrying mines toward enemy ships.

Chairman of the Joint Chiefs of Staff Gen. Dan Caine appeared unfamiliar with the claim, reacting with a laugh when asked about it.

“I haven’t heard the kamikaze dolphin thing. It’s like sharks with laser beams, right?” he said, referencing the fictional weapon from the “Austin Powers” films.

U.S. military dolphins have been used in combat before — but not as weapons. During the Iraq War, Navy-trained dolphins were deployed to the Persian Gulf to help clear mines from the port of Umm Qasr, using their natural sonar to locate and mark underwater explosives so divers could neutralize them.

The U.S. Navy has long trained marine mammals for missions such as detecting underwater mines and tracking divers, and Soviet programs during the Cold War experimented with more offensive uses.

Iran reportedly acquired dolphins from a former Soviet program in 2000, though there is no confirmed evidence such capabilities are active today.