The U.S. and South Korea on Monday launched eight missiles toward the East Sea, Seoul's Joint Chiefs of Staff (JCS) said, in apparent retaliation for North Korea’s launch of eight short-range ballistic missiles (SRBMs) the previous day.

Together the two countries fired eight Army Tactical Missile System (ATACMS) missiles over a ten-minute period beginning at 4:45 a.m. KST. South Korea fired seven of the missiles and the U.S. fired one, all from the country’s northeast. The U.S.-ROK missile test is the second time the two countries have conducted a joint drill immediately following a North Korean missile test since last month.