SEOUL - The Republic of Korea's military vowed on Tuesday to "act resolutely" against future provocations after the Democratic People's Republic of Korea fired an artillery barrage into waters near the two countries' disputed Yellow Sea border.

Some 10 of the 130 shells which were fired on Monday evening landed on the ROK's side of the line, Seoul military officials said, heightening months of tensions.

The ROK's military in a faxed message to the DPRK described the firing as a "grave provocation" that violates the armistice and a non-aggression agreement, a spokesman for the Joint Chiefs of Staff told AFP.