In its latest move that could ramp up tension on the Korean Peninsula, North Korea on Sunday morning fired four projectiles into the Yellow Sea, South Korean military officials said. The four shots were fired from an unspecified location in western North Korea and fell into the sea off the nation’s west coast during a span of an hour around 7:20 a.m. local time, according to officials, reported Yonhap News Agency. “There were shots believed to be that of North Korea’s multiple rocket launchers this morning,” an official from the South Korean military said at an emergency meeting, adding that the South Korean force is “maintaining defense readiness posture” while closely monitoring the developments. North Korea has been conducting a string of missile tests since the beginning of this year. On Jan. 17, it fired a Hwasong-12 intermediate-range ballistic missile, which has an estimated range of 4,500 kilometers (2,796 miles) …