The death toll from US airstrikes on an oil port in western Yemen has risen to at least 74 people, the Houthi-run health ministry reported, marking the deadliest day since the United States escalated its aerial campaign against the Iran-backed group last month.

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 the Ras Isa oil port held by Yemen’s Houthi rebels killed 38 people and wounded 102 others, the group said early Friday. The strikes, confirmed by the U.S. military’s Central Command,