The U.S. military attacked an oil port in western Yemen, killing dozens of people as the Trump administration continues to intensify its strikes against the Houthi rebels.

The US says the attack on the Red Sea coast aimed to restrict supplies and funds for the Houthis, who called it a war crime.

U.S. airstrikes targeting an oil port held by Yemen’s Houthi rebels killed 74 people and wounded 171 others, the group said Friday, in the deadliest known attack under President Donald Trump’s new military campaign against the Iranian-backed faction.