Seoul, South Korea (CNN) -- South Korea has reportedly deployed more long-range artillery and rocket launchers on Yeonpyeong Island, a border island struck by a North Korean shelling last week, according to military officials.
The officials' remarks were reported Monday by the Yonhap news agency in Seoul.
The report comes as joint military exercises between South Korea and the United States continue in the Yellow Sea and tensions with North Korea continue to brew.
On Monday, South Korean President Lee Myung-bak said South Korea will "firmly" respond to future provocations from North Korea and declared that his nation "cannot remain patient" in the face of continued hostility from Pyongyang.
"Fellow citizens, at this point, actions are more important than words," Lee said in a televised address. "Please have trust in the government and the military and support us".
The divided peninsula -- tense at the best of times -- has been near the boiling point since Tuesday, when four people died in a North Korean artillery barrage that targeted Yeonpyeong Island.
Lee called that attack an "inhuman crime" that followed decades of previous attacks from North Korea, including the sinking of the South Korean warship Cheonan in March. CNN
