US secretary of state accuses Iran of recent attacks on oil tankers and downing of an American drone. PHOTO: REUTERS/FILE
Pompeo confirmed in an interview with CBS that a US MQ-9 "Reaper" drone was shot down June 6 with a missile fired from Yemen "that we assess had Iranian assistance."
Pompeo would not be drawn on what options the US is considering to protect shipping - or to punish Iran - in the wake of Thursday's attacks on two tankers in the Gulf of Oman, but reiterated that President Donald Trump is not seeking war with Iran.
"What you should assume is we are going to guarantee freedom of navigation throughout the strait," he said in an interview on Fox News Sunday.
Saudi Arabia blames Iran for tanker attacks but doesn't want war
Iran has denied the US charges as "baseless" and said they were made without "a shred of factual or circumstantial evidence".
A third of the world's seaborne oil supply passes through the Strait of Hormuz, a narrow channel bordered to the north by Iran that links the Gulf with the Gulf of Oman.
"This is an international challenge, important to the entire globe. The United States is going to make sure that we take all the actions necessary, diplomatic and otherwise, that achieve that outcome," Pompeo said.
The rising tensions have raised fears of an outbreak of hostilities in the tinderbox region.
"We don't want a war. We've done what we can to deter this," Pompeo said. "The Iranians should understand very clearly that we will continue to take actions that deter Iran from engaging in this ... kind of behavior."
The secretary would not lay out US evidence for Iran's involvement in the Gulf of Oman explosions, but insisted: "It's unmistakable what happened here.
"These were attacks by the Islamic Republic of Iran on commercial shipping, on the freedom of navigation, with the clear intent to deny transit through the strait."
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