The Navy retaliated for missiles fired at its ships off the coast of Yemen in recent days by destroying three radar sites in rebel-held territory, the Pentagon announced late Wednesday.
The Navy's counter attack with multiple Tomahawk land-attack cruise missiles was approved by President Obama.
"The United States will respond to any further threat to our ships and commercial traffic, as appropriate, and will continue to maintain our freedom of navigation in the Red Sea, the Bab al-Mandeb, and elsewhere around the world," Pentagon press secretary Peter Cook said in a statement.
The sites, in territory controlled by Shiite rebels known as Houthis on the Yemen's Red Sea coast, appear to have been destroyed, Cook said.
The Tomahawks were fired from the USS Nitze at about 4 a.m. local time, the Pentagon said.
