WASHINGTON (AP) — The U.S. military early Saturday struck another Houthi-controlled site in Yemen that it had determined was putting commercial vessels in the Red Sea at risk, a day after the U.S. and Britain launched multiple airstrikes targeting Houthi rebels.

Associated Press journalists in Sanaa, Yemen’s capital, heard one loud explosion.

U.S. Central Command said the “follow-on action” early Saturday local time against a Houthi radar site was conducted by the Navy destroyer USS Carney using Tomahawk land attack missiles.