US military has launched cruise missiles against three coastal radar sites in areas of Yemen controlled by Iran-aligned Houthi forces. <br/><br/>Pentagon spokesman Peter Cook said, the strikes represent Washington's first direct military action against suspected Houthi-controlled targets in Yemen's conflict. <br/><br/>He said self-defence strikes were aimed at radar that enabled the launch of at least three missiles against the U.S. Navy ship USS Mason on Sunday and Wednesday. <br/><br/>Cook said, the strikes were not connected to the broader civil war in Yemen, which has killed more than 10,000 people since March 2015 in the Arab world's poorest country.