South Korea has held live firing drills in a disputed area, despite threats of war from North Korea.
The exercises come a day after an emergency UN Security Council meeting failed to agree on how to defuse the crisis. Their efforts to negotiate a statement on the Korean military crisis remain deadlocked today.
The drill, which was delayed by bad weekend weather, lasted almost two hours.
The constant artillery fire shook buildings on the island of Yeonpyeong.
'I can't exactly tell how many have been fired, some are distant and some are noisy. The bunker is shaking and people here are worried, including myself,' said a witness.
North Korea's military supreme command said it 'did not feel any need to retaliate against every despicable military provocation'.
'The world should properly know who is the true champion of peace and who is the real provocateur of a war,' it said in a statement on the official news agency KCNA.
South Korea last conducted firing drills from Yeonpyeong, which is close to the disputed maritime border off the west coast of the peninsula, on 23 November.
On that occasion, the North retaliated by shelling the island, killing two civilians and two marines in the worst attack on South Korean territory since the Korean War ended in 1953.
China has renewed its call for talks to defuse the tension and voiced misgivings about South Korea's military drill.
