"We are in charge of maintaining security of the Strait and we rescued the crew of those attacked tankers in the shortest possible time".
Mr Pompeo said: "This is based on intelligence, the weapons used, the level of expertise needed to execute the operation, recent similar Iranian attacks on shipping, and the fact that no proxy group operating in the area has the resources and proficiency to act with such a high degree of sophistication". "These accusations are alarming".
Over the recent weeks, Washington has ratcheted up pressure on Tehran with a series of sanctions, designations and military threats, trying to press Iran back to negotiations after USA exit from the landmark Iran nuclear deal over a year ago.
The footage, it says, show's Iran's Revolutionary Guard "removing [an] unexploded limpet mine" from the side of the Kokuka Courageous more than eight hours after the blasts occurred.
Already, Iran says it has quadrupled its production of low-enriched uranium.
A statement late Thursday from the mission also called on the global community to prevent "the reckless and unsafe policies and practices of the US and its regional allies in heightening the tensions in the region".
The attacks coincided with a trip by Japanese Prime Minister Shinzo Abe to Iran, where he met with Ayatollah Seyyed Ali Khamenei in a failed attempt to calm rising tensions between Tehran and Washington.
Oil prices surge after suspected tanker attack near Iran
Saudi Arabia and the UAE have said attacks on oil assets in the Gulf pose a risk to global oil supplies and regional security. He said the government has set up a task force and that the government has informed the shipping industry to use precautions.
Safe havens including Gold are on the bids as a recent tussle between the USA and Iran over 2 oil tankers' blast in the Gulf of Oman turns serious. The owner of the Japanese ship was quoted as saying that the vessel was hit twice with "some kind of shell".
Saudi Arabia's ambassador to the United Nations Abdullah Al-Mouallimi blamed a May attack on oil tankers from multiple countries on Iran.
Jeremy Hunt warned Tehran that, if it is proven to be behind the incident, it would be a "deeply unwise escalation which poses a real danger to the prospects of peace and stability in the region".
Iran has denied being involved in the attack, accusing the us of carrying out an "Iranophobic campaign" against it.
The crew of the Kokuka was then transferred to the USS Bainbridge said a spokesman for the U.S. Central Command, reported AP.
"There was an MQ-9 in the vicinity" overhead where the tankers Front Adair and Kokuka Courageous were proceeding in the Gulf Thursday, the official said.
The tensions between the USA and Iran are already high over the U.S. pullout from the 2015 nuclear accord and the reimposition of economic sanctions.
Japanese Industry Minister Hiroshige Seko said on Friday that the incidents will be discussed at a meeting of G20 energy and environment ministers this weekend.
Tehran's foreign minister Mohammad Javad Zarif on Friday fired back at Washington, accusing the US, Israel and Saudi Arabia of a plot to "sabotage diplomacy", and appeared to insinuate that those countries were behind the assaults.