A shooting spree by a 19-year-old Marine corporal on Monday has left four soldiers dead, the Marine Corps said.

The incident took place inside a barrack of the Marine Second Division on Ganghwa Island off the west coast at around 11:50 a.m., officials said. The corporal, identified only by his surname Kim, opened fire with a K-2 rifle.

Kim was captured after the incident. A grenade also exploded at the scene, and its shrapnel apparently injured Kim, officials said, adding that they are now investigating how the incident took place.

해병대 2사단의 강화도 해안 소초에서 4일 오전 11시50분께 김모 상병이 총기를 난사해 부사관 등 3명이 사망하고 병사 3명이 부상했다고 군 관계자가 밝힌 가운데 사고가 난 예하부대에 헌병들이 취재진을 통재하기위해 바쁘게 움직이고 있다.<br />이상섭 기자 babtong@heraldm.com 2011.07.04 Military police are deployed after a shooting spree at a base of the Marine Second Division on Ganghwa Island on Monday. Lee Sang-sub/The Korea Herald
해병대 2사단의 강화도 해안 소초에서 4일 오전 11시50분께 김모 상병이 총기를 난사해 부사관 등 3명이 사망하고 병사 3명이 부상했다고 군 관계자가 밝힌 가운데 사고가 난 예하부대에 헌병들이 취재진을 통재하기위해 바쁘게 움직이고 있다.
이상섭 기자 babtong@heraldm.com 2011.07.04 Military police are deployed after a shooting spree at a base of the Marine Second Division on Ganghwa Island on Monday. Lee Sang-sub/The Korea Herald

Military police are deployed after a shooting spree at a base of the Marine Second Division on Ganghwa Island on Monday. (Lee Sang-sub/The Korea Herald)

A staff sergeant, two corporals and a lance corporal were killed in the rampage. Kim and another private first class who was injured in the incident are not in critical condition, officials said.

“We have set up an investigation team at the scene to find out the exact cause of the spree. We are sorry for causing concerns and will do our best to tighten military discipline, boost soldiers’ morale and prevent the repeat of such an incident,” Col. Kim Tae-eun told reporters.

The tragedy follows a set of incidents in the Marine Corps that have sparked criticism over “slackened discipline.”

On June 17, Marine troops fired at a South Korean passenger plane after mistaking it for a North Korean fighter jet. The troops from the Marine Second Division fired 99 shots with K-2 rifles at the Asiana flight carrying 119 crewmembers.

Marine officials said that the mistake was due to heavy fog. The incident resulted in calls for more enhanced education on how to distinguish between friendly and hostile aircraft.

On June 15, one Marine corporal stationed on Bangnyeong Island shot himself in the head with a K-2 rifle in an apparent suicide. The incident occurred while he was on a morning patrol mission.

By Song Sang-ho (sshluck@heraldm.com)