North Korea, South Korea Exchange Gunfire

(CNN) North Korean and South Korean military units exchanged gunfire near their border Friday, the South Korean Yonhap news agency reported.

The exchange happened after North Korean forces fired two shots at a South Korean military guard post near the border in Hwacheon, South Korea, about 73 miles (118 km) northeast of Seoul, Yonhap reported, citing an official at the Joint Chiefs of Staff.

The South Korean troops fired back, Yonhap said.

The demilitarized zone at the location of the shooting is 1.3 kilometers (0.8 miles) wide.

The incident occurred near the strategic town of Chorwon, which was the scene of heavy fighting during the 1950-53 Korean War.

North Korea on Friday threatened to retaliate against its neighbor for shunning bilateral military talks.

The gunfire exchange apparently won't cancel reunions of families separated by the Korean War, which ended in a truce but no formal peace treaty. The weeklong reunions begin Saturday at Mount Kumgang, the two countries' joint mountain resort in the North.

North Korea has requested record shipments of rice and fertilizer in exchange for concessions on the reunions, Yonhap said earlier this week.