SEOUL, South Korea (TheStreet) -- The U.S. and South Korea launched joint military exercises Sunday, while China called for an emergency meeting to ease rising regional tensions.

A U.S. supercarrier and a South Korean destroyer took positions in the Yellow Sea for the exercises Sunday, the

Associated Press

reported. The war games come less than a week after a North Korean artillery attack on the island of Yeonpyeong killed four South Koreans.

Meanwhile, China's top nuclear envoy, Wu Dawei, called for an emergency meeting in early December among regional powers involved in nuclear disarmament talks, the

AP

added.

China has long been an ally of the North Korean government, and both South Korea and the U.S. had been pressing Beijing to step in and help calm tension between the two Koreas.

South Korea said China's proposal should be "reviewed very carefully" in the wake of the disclosure that North Korea had a new uranium-enrichment facility, the

AP

added.

North Korea said Seoul had provoked this week's artillery attack by staging artillery drills near the two Koreas' maritime border and has threatened to be "merciless" if the U.S.-South Korean military exercises get too close to its territory, the

AP

also noted.

This article was written by a staff member of TheStreet.