'Major Provocation': Iran Downs U.S. Drone: Sends 'Clear Message'

Iran downs U.S. drone, says 'completely ready for war' In a major provocation, Iran shot down a U.S. Navy drone while it was flying in international airspace over the Strait of Hormuz, a U.S. official said. Iran says drone was in Iranian airspace

In a major provocation, Iran shot down an unarmed and unmanned U.S. Navy MQ-4C Triton drone while it was flying in international airspace over the Strait of Hormuz Thursday, a U.S. official told ABC News.

The incident is sure to trigger serious discussions within the Trump administration about how to respond to a direct attack on a U.S. military asset that goes beyond recent attacks in the Middle East that the U.S. has blamed on Iran.

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Gen. Hossein Salami, commander of Iran's Islamic Revolutionary Guard Corps, offered a strongly worded threat to the U.S. after the drone was downed.

"Shooting down the American spy drone had a clear, decisive, firm and accurate message," he said, translated from Farsi. "The message is that the guardians of the borders of Islamic Iran will decisively respond to the violation of any stranger to this land. The only solution for the enemies is to respect the territorial integrity and national interests of Iran."

The U.S. Navy MQ-4C Triton was shot down by an Iranian surface to air missile while the reconnaissance drone was flying in international airspace over the Strait of Hormuz on Thursday, a U.S. official told ABC News.

Earlier, Iranian state media had quoted Iran's Islamic Revolutionary Guard Corps as saying it had downed a Global Hawk drone when it entered Iranian airspace near the Kouhmobarak district north of the Strait of Hormuz.

The MQ-4C Triton is an unarmed surveillance aircraft powered by a jet engine, which is capable of operating at altitudes as high as 60,000 feet. It is the Navy's version of the reconnaissance aircraft that the Air Force calls the RQ-4 Global Hawk.

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The incident is not the first time in recent days that Iran has targeted an American drone off its coast.

Last Thursday, Iran attempted to shoot down an MQ-9 Reaper that was surveilling the attack on one of two tankers in the Gulf of Oman. The United States has blamed Iran for being responsible for the attacks on the two tankers -- a claim Iran has denied.