North Korean leader Kim Jong Un did not undergo surgery during almost three weeks of absence from public life, a South Korean official said on Sunday, as the two Koreas exchanged gunfire at the Demilitarized Zone (DMZ) separating the two sides. The government official declined to provide reasons, but said speculative reports that Kim had had an operation, citing some differences in his leg movements, were untrue. Multiple gunshots were fired from North Korea towards a guard post in South Korea, the South’s Joint Chiefs of Staffs (JCS) said in a statement.