An attack by Yemeni Houthi rebels on a Belize-flagged ship earlier this month caused an 18-mile (29-kilometer) oil slick, the U.S. military said Saturday.

“The Houthis continue to demonstrate disregard for the regional impact of their indiscriminate attacks, threatening the fishing industry, coastal communities, and imports of food supplies,” it said.

The Associated Press, relying on satellite images from Planet Labs PBC of the stricken vessel, reported Tuesday that the vessel was leaking oil in the Red Sea.