North Korea on Tuesday threatened to turn South Korea into a "sea of fire" in protest against live-fire drills near Yeonpyeong Island.
The official [North] Korean Central News Agency said South Korean "warmongers" carried out military provocations against Pyongyang, which is ready to respond "with its strong firepower at any time."
South Korean Marines conducted live-fire exercises on Yeonpyeong Island in the West Sea, which suffered heavy North Korean artillery fire in 2010.
Marines fired 200 rounds from K-9 self-propelled howitzers and AH-1S Cobra attack helicopters fired rockets and Vulcan machine guns.
The drills are held every three months.
KCNA said the South Korean "provocations" were a response to the "great successes" of North Korea's test launches of the Hwasong-14 intercontinental ballistic missile, which is capable of reaching the U.S. mainland. Read this article in Korean