A top South Korean official has admitted that North Korea can now mount a nuclear warhead on a medium-range Rodong missile, Reuters reported. Kim Jong Un claimed last month that Pyongyang had successfully miniaturized nuclear warheads to fit them atop ballistic missiles. Up until now, Seoul has said the North’s efforts were incomplete—a belief the South’s defense ministry reaffirmed Tuesday. But an unnamed official told Reuters that was no longer truly the case. “We believe they have the ability to mount a nuclear warhead on a Rodong,” an official told Reuters. “Whether they will fire it like that is a political decision.” He refused to discuss what evidence led to that conclusion. The Rodong missile can fly as far 1,250 miles, putting South Korea and parts of Japan, Russia, and China within range.