Hijjah, 1431/Nov 26, 2010, SPA -- North Korea warned Friday that U.S.-South Korean plans for military maneuvers put the peninsula on the brink of war, and appeared to launch its own artillery drills within sight of an island it showered with a deadly barrage this week. According to AP, the fresh artillery blasts were especially defiant because they came as the U.S. commander in South Korea, Gen. Walter Sharp, toured the South Korean island to survey damage from Tuesday's hail of North Korean artillery fire that killed four people. None of the latest rounds hit the South's territory, and U.S. military officials said Sharp did not even hear the concussions, though residents on other parts of the island panicked and ran back to the air raid shelters where they huddled earlier in the week as white smoke rose from North Korean territory. Tensions have soared between the Koreas since the North's strike Tuesday destroyed large parts of this island, killing two civilians as well as two marines in a major escalation of their sporadic skirmishes along the sea border.