PYONGYANG, May 8 (Xinhua) -- South Korea's intrusion into the west territorial waters of the Democratic People's Republic of Korea (DPRK) has raised tensions in the region, the official news agency KCNA said Thursday.

    The South Korean navy had deployed more warships in the DPRK territorial waters to show its will to protect the Northern Limit Line (NLL), said a commentary carried by the KCNA.

    The commentary said South Korea's intrusion would put the inter-Korean relations into a more dangerous situation and hinder the process of resolving the nuclear issue on the Korean Peninsula.

    The Korean People's Army is in high vigilance on the moves of the South Korean navy, it added.

    The NLL was marked after the 1950-1953 Korean War by the United Nations Command. South Korea views it as the inter-Korean western sea border, while the DPRK has not accepted the concept.

    The navies of the two sides once had two clashes in 1999 and 2002 around of the NLL waters, which resulted in heavy casualties on both sides.