Meanwhile , South Korea and the United States wrapped up joint military exercises on the Yellow Sea , while South Korea carried on with plans for artillery firing drills next week amid simmering tensions with Pyongyang . Intelligence chief warns of more attacks . The U.S. government has warned that the threat from al Qaeda and its affiliates is growing. S. Korea is in talks with the U.S. for more drills to deal with `` provocation by the enemy '' Government ministers from South Korea and Japan will attend a December meeting . North Korea warns U.S.-South Korea drills could lead to `` all-out war any time ''
Intelligence chief warns of more attacks . The U.S. government has warned that the threat from al Qaeda and its affiliates is growing. S. Korea is in talks with the U.S. for more drills to deal with `` provocation by the enemy '' Government ministers from South Korea and Japan will attend a December meeting . North Korea warns U.S.-South Korea drills could lead to `` all-out war any time ''