South Korea and its northern neighbor, the DPRK, have exchanged fire in waters off the west coast of the divided Korean Peninsula on November 23, 2010. It's seen as the most severe exchange of fire in nearly 6 decades.

		S. Korea open to dialogue with DPRK

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S. Korea calls DPRK 'enemy'		South Korea mulls DPRK aid conditions

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S. Korea conducts new round of live-fire drills		Western Pacific to see 3 US aircraft carriers

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South Korea vows retaliation if DPRK attacks again		S. Korean President calls for solidarity

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South Korea to conduct marine exercises		China urges calm on Korean peninsula

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200 South Koreans holds vigil for 4 killed in strike		South Korea raises military alert

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?South Korean officials discuss security		More details on S. Korean live-fire drill

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S. Korea to conduct live-fire drills		DPRK on alert for S. Korean drills

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Civil drill conducted in South Korea		DPRK: S. Korea provoked fire exchanges

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U.S., Japan hold field training drill		Tension soars on Korean peninsula

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Japan, U.S. continue military drills		Tension grows ahead of S. Korea's firing exercises

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China: Only dialogue can resolve problems		S. Korea to observe Japan-U.S. Military drills

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S. Korea, U.S. wrap up joint military exercise		U.S.-S. Korean drill enters final day

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U.S.-S. Korea naval drill enters 3rd day		S. Korean President meets US military commander

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S. Korean President: DPRK's attacks on civilians a crime		S. Korea - U.S. drill enters second day

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DPRK blames U.S., ROK joint military exercises		S. Korea, U.S. hold naval drill

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DPRK warns of war over U.S.-S. Korea drill		Clash between DPRK, S. Korea kills 4 South Koreans, injures 16

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DPRK, S. Korea exchange fire off coast of divided Peninsula		2 South Korea soldiers killed from artillery attack

The incident happened near the contentious sea border called the Northern Limit Line. Two South Korean marines and two civilians were killed, and 16 others were wounded.

Tensions are running high on the Korean Peninsula.

On November 28, South Korea and the United States launched a four-day joint naval drill in tense waters west of the divided Korean Peninsula. The drills come despite the current tension between South Korea and the DPRK.