Caves with coastal artillery are seen at the North Korean village of Jangyeon where North Korea's military units are stationed as Chinese fishing boats move on the North Korean side past the Northern Limit Line (NLL), in this photo taken from South Korea's Baegnyeong island, northwest of Seoul January 28, 2010. North Korea fired several artillery rounds on Thursday in the direction of a South Korean island off the peninsula, a second day of shooting near a disputed sea border that has been the site of deadly clashes in the past.