6 Apr 2012

North Korean subs sought

6:09 am on 6 April 2012

South Korea is reportedly searching for four North Korean submarines that disappeared after leaving their bases.

A military source quoted in a South Korean newspaper says up to four North Korean submarines slipped out of port in recent days and have so far avoided detection.

Seoul is now on alert for a possible strike against a naval ship.

The South accuses the North of using a midget submarine to sink one of its ships two years ago, which left 46 sailors dead.