S. Korea, U.S. start joint anti-submarine naval drill

South Korea and the United States have staged a joint anti-submarine naval drill to tackle North Korea's threats, sparked by the North's test-firing of a submarine-launched ballistic missile, the Navy said Monday.

The two allies kicked off the largest-ever combined anti-submarine exercise Saturday that will run through Wednesday in waters off South Korea's southern resort island of Jeju.

"The drill is aimed at deterring submarine-related provocations and beefing up the Navy's capacity to protect a southern maritime pathway, a key factor in maintaining operational logistics during war," the Navy said in a statement.

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