The Pentagon vowed to track down and deliver payback to whoever's responsible for firing two missiles at a Navy destroyer off the coast of Yemen Sunday, according to NBC News.
"We are going to find out who did it and take action accordingly," said Capt. Jeff Davis, a Defense Department spokesman. "Anybody who puts U.S. Navy ships at risk does so at their own peril."
Davis did not say who is suspected or how they planned to retaliate for the attack, which missed the USS Mason Sunday evening near the strait of Bab el-Mandeb, which separates the country from Africa.
The attack came as thousands of Yemenis marched outside United Nations headquarters in the capital to protest a Saudi-led coalition strike on Saturday that killed at least 140 people.