21.   On Friday, Pyongyang said it may restart the program and accused the United States of bowing to South Korean anger over a submarine incursion.

22.   One young woman was hauled in for asking in a University magazine whether a North Korean submarine incursion might have been an accident.

23.   Seoul has made an apology over the submarine incursion a precondition of sending engineers to North Korea to build light-water reactors.

24.   Seoul on Friday issued the first approvals for South Korean firms to do business with North Korea since a submarine incursion by the North four months ago.

25.   South Korea has demanded an apology for the submarine incursion which it called not only a violation of the armistice rules but of its territorial integrity.

26.   South Korea has demanded an apology for the submarine incursion, which it called a violation of the armistice rules and its territorial integrity.

27.   South Korea has demanded an apology for the submarine incursion, which it called not only a violation of the armistice rules but of its territorial integrity.

28.   South Korean officials have called for reconsidering the relief assistance in the wake of the submarine incursion.

29.   Tension has eased considerably between the rival states since North Korea apologised this week for a submarine incursion in September.

30.   The announcement came a day after Pyongyang apologized for a submarine incursion into South Korea.