4 Indonesian soldiers killed in South China Sea exercise

Four Indonesian soldiers were killed when a Chinese-made anti-aircraft cannon malfunctioned during an exercise in the Natuna island chain in the South China Sea, the Indonesian military said Thursday.

Army spokesman Alfret Denny Tuejeh said eight other soldiers were wounded in the accident Wednesday in the Tanjung Datuk region of Riau Islands province.

He said the malfunction of the twin-barreled gun caused it to fire in unexpected directions and hit the soldiers, who are members of the Quick Response Team of the Army's Air Defense Artillery Unit. Four of the wounded are in serious condition.

Tuejeh said an investigation is underway to find out why the weaponry, purchased from China in 2003, malfunctioned.

Indonesia has boosted its military presence in the Natuna islands, which are in the southernmost reaches of the South China Sea, in response to Beijing's assertive posture in the region.

Unlike several other Southeast Asian nations, Indonesia does not have a territorial dispute with China. But China's "nine-dash line" that signifies its expansive claims to the sea overlaps with Indonesia's internationally recognized exclusive economic zone.