Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. South Korea Announces, Then Cancels New Military Drill VOA News 29 November 2010 South Korean marines guard on Yeonpyeong island, South Korea, Monday, Nov. 29, 2010. Photo: AP South Korean marines guard on Yeonpyeong island, South Korea, Nov. 29, 2010. South Korean forces announced - but then called off - a second round of live fire exercises on Yeonpyeong island - that would have repeated the drill that sparked a fatal artillery barrage on the island from North Korea last week. Residents of the island had been warned by loudspeakers to take shelter in bunkers beginning Tuesday morning. But military officials said late Monday the drill has been canceled. They offered no explanation. Tensions already are running high as U.S. and South Korean naval vessels conduct exercises in nearby waters in the Yellow Sea. Earlier Monday, President Lee Myung-bak apologized to the nation for the weak response to the North Korean attack and promised Pyongyang will "pay a dear price" if it attacks again. North Korea says it attacked the island, killing two soldiers and two civilians, because the South ignored its warning not to fire into disputed waters around the island. It says any further such provocation will be met with a "merciless" attack. Last week's attack, involving more than 100 artillery shells, also wounded 18 people and destroyed numerous buildings on the island, which lies just 12 kilometers off the North Korean coast. The South fired about 80 artillery rounds and scrambled jet fighters in response. However South Korea's opposition parties and public have been demanding a tougher response. The South already has reinforced its garrisons on Yeonpyeong and four other islands and rewritten its rules of engagement to permit a more robust reply to future attacks. China, facing intense international pressure to rein in its allies in Pyongyang, called for on Sunday an emergency meeting of the six nations that have been trying to negotiate an end to North Korea's nuclear programs. South Korea and the United States have said they are studying the proposal but say they are reluctant to reward North Korea for bad behavior. Some information for this report was provided by AP and AFP. .