AKIPRESS.COM - South Korea's military has said its troops exchanged fire with North Korea along their tense land border, media report.

The Joint Chiefs of Staff in Seoul said North Korean troops fired several bullets at a South Korean guard post inside the heavily fortified border between the two countries at 7:41 am on Sunday. 

South Korea fired two rounds in response after issuing a warning broadcast, the military said in a statement, adding it suffered no casualties. 

Sunday's exchange of fire took place one day after North Korea reported its leader Kim Jong Un's first public appearance in about 20 days amid intense speculation about his health. 

The Koreas are split along the 248-kilometre-long, 4-kilometer-wide (154-mile-long, 2.5-mile-wide) border region called the Demilitarized Zone that was originally created as a buffer.