North Korea is deploying improved artilleries with a longer range at its front-line military units, a government source said Sunday, June 30, indicating that they will pose a greater threat to South Korea's capital areas, Yonhap news agency reported.

North Korea's military is replacing 107-millimeter-caliber multiple rocket launchers deployed at its front-line artillery units with the improved 240-mm-caliber multiple rocket launchers, the source said.