North Korea warning as US and South begin war games

The sound of new artillery fire from North Korea just hours after the US and South Korea launched a round of war games in Korean waters sent residents and journalists on a front-line island scrambling for cover today.

None of the rounds landed on Yeonpyeong Island, military officials said, but the incident showed how tense and uncertain the situation remained along the Koreas' disputed maritime border five days after a North Korean artillery attack decimated parts of the island and killed four South Koreans.