Oil prices rose on Monday after President Donald Trump said the U.S. would hold Iran responsible for any future attack by the Houthis, a militant group in Yemen that has repeatedly launched strikes on commercial shipping.

U.S. crude oil futures rose 40 cents, or 0.6%, to $67.58 per barrel. Global benchmark Brent traded 44 cents, or 0.62%, higher at $71.02 per barrel.

“Every shot fired by the Houthis will be looked upon, from this point forward, as being a shot fired from the weapons and leadership of IRAN,” Trump said in a post on social media platform Truth Social. “IRAN will be held responsible, and suffer the consequences, and those consequences will be dire!”

Trump’s threat comes after the U.S. launched a new wave of airstrikes against the Houthis over the weekend. Defense Secretary Pete Hegseth said Sunday the U.S. campaign will continue until the militant group halts its attacks.

“This campaign is about freedom of navigation and restoring deterrence,” Hegseth told Fox News’ Sunday Morning Futures. “The minute the Houthis say we’ll stop shooting at your ships, we’ll stop shooting at your drones, this campaign will end. But until then, it will be unrelenting.”

The Houthis began targeting commercial shipping traversing the Red Sea in late 2023 in support of Hamas, after the Palestinian militant group launched a surprise attack on southern Israel and Israel responded with a ground and air campaign in Gaza. The Houthis and Hamas are both allied with Iran.

The Houthi strikes have forced international shipping companies to re-route container ships that would normally pass through the Red Sea and Suez Canal.

Trump has re-imposed a “maximum pressure” campaign against Iran with goal of driving down the Islamic Republic’s oil exports. Treasury Secretary Scott Bessent recently said the Trump administration’s goal is to collapse Iran’s economy.

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