SEOUL, South Korea (AP)-- North Korea fired artillery barrages onto a South Korean island near their disputed border Tuesday, setting buildings alight and prompting South Korea to return fire and scramble fighter jets. At least one South Korean marine was killed and 13 wounded, the military said.
The firing came amid South Korean military drills in the area. North Korea's military had sent a message to South Korea's armed forces early Tuesday to demand that the drills stop, but the South continued them, said an official at South Korea's Joint Chiefs of Staff.
During the drills, South Korean marines on the island shot artillery toward southern waters, away from North Korea, the official said. He spoke on condition of anonymity because of military rules.
The skirmish also came amid high tension over North Korea's claim that it has a new uranium enrichment facility and just six weeks after North Korean leader Kim Jong Il unveiled his youngest son Kim Jong Un as his heir apparent.
The artillery barrages struck the small South Korean-held island of Yeonpyeong, which houses military installations and a small civilian population in an area that has been the focus of two previous deadly battles between the Koreas.
One South Korean marine was killed, three were seriously wounded and 10 slightly wounded, a Joint Chiefs of Staff official said. Island residents were escaping to about 20 shelters in the island and sporadic shelling was continuing, the JCS said.
South Korea responded by firing K-9 155mm self-propelled howitzer, but the JCS official declined to say whether North Korean territory was hit.
YTN TV said several houses were on fire and shells were still falling on the island, which is about 75 miles (120 kilometers) west of the coast. The station broadcast pictures of thick columns of black smoke rising from the island, which has a population of 1,200 to 1,300. Screams and chaotic shouts could be heard on the video.
President Lee Myung-bak ordered officials to "sternly respond" to North Korea's action but also called on officials to make sure that the "situation would not escalate," according to a presidential official. He asked not to be identified, citing the issue's sensitivity.
Lee was holding a security meeting in a presidential situation room, the official said.
China, which is the North's economic and political benefactor while maintaining robust commercial ties with the South, called for calm.
"We express our concern over the situation. The situation is to be verified," Chinese Foreign Ministry spokesman Hong Lei said at a regularly scheduled media briefing in Beijing. He called on both Koreas without naming them "to do more to contribute to peace and stability on the peninsula."
In a message to North Korea's armed forces, South Korea's military urged the North to stop provocations and warned of strong measures unless the North stopped, a Joint Chiefs of Staff official said.
Tensions between the two Koreas have remained high since the sinking in March of a South Korean warship in which 46 sailors died. Seoul blamed a North Korean torpedo, while Pyongyang has denied any responsibility.
The countries' western maritime boundary has long been a flash point between the two Koreas. The North does not recognize the border that was unilaterally drawn by the United Nations at the close of the 1950-53 Korean War.
North and South Korea have fought three bloody skirmishes near the maritime border in recent years, most recently in November 2009. That battle left one North Korean officer dead and three others wounded, according to South Korean officials.
Two deadly clashes have previously erupted around Yeonpyeong. In a gunbattle in June 2002, one South Korean warship sank, killing six sailors. The North said it also suffered casualties, but didn't confirm how many. In a 1999 clash, South Korea said several sailors were wounded, and that up to 30 North Koreans died.
The existence of North Korea's new uranium enrichment facility came to light over the weekend after Pyongyang showed it to a visiting American nuclear scientist, claiming that the highly sophisticated operation had 2,000 completed centrifuges. Top U.S. military officials warn that it could speed the North's ability to make and deliver viable nuclear weapons.
The military tensions between the two Koreas also comes amid a visit to the region by U.S. special envoy on North Korea, Stephen Bosworth. He held talks with South Korean officials Monday and was also scheduled to meet officials in China.