North Korean leader Kim Jong Un convened a meeting with military officers and called for creating an "impregnable fortress" on the border with South Korea, state-run media reported Monday. In this March photo, Kim inspects troops at a military exercise. File Photo by KCNA/UPI | License Photo

SEOUL, May 18 (UPI) -- North Korean leader Kim Jong Un convened a meeting with commanding officers from across the country's armed forces and called for strengthening frontline defenses along the border with South Korea to create an "impregnable fortress," state-run media reported Monday.

Kim held the meeting at the headquarters of the ruling Workers' Party Central Committee on Sunday, the official Korean Central News Agency said. It was the first known gathering of all division and brigade commanders since Kim took power in 2011.

Kim called for the "rapid modernization of the military and technical equipment of our army" and stressed the need to adapt military training to the changing nature of modern warfare, KCNA said.

He emphasized the country's "territorial defense" policy, including "strengthening the first-line units in the southern border and turning the border line into an impregnable fortress," according to the report.