4 N.Korean Subs Disappear from Radar

Four 300-ton North Korean submarines disappeared in the East Sea on Monday, the government said Tuesday, and the military is trying to track them down.

"Four shark-class submarines left Chaho Base in South Hamgyong Province on Monday" when President Lee Myung-bak delivered a nationally televised speech about sanctions against North Korea, "and their whereabouts are unknown," a government official said.

"It is rare for four North Korean subs to disappear at once."

Read more