Foreign Minister Kim Sung-hwan on Tuesday said it is "very likely" that North Korea has more undisclosed uranium enrichment facilities in addition to a plant it showed a visiting U.S. expert last month.

Kim was commenting on remarks from Siegfried Hecker that it is "highly likely that a parallel covert facility capable of [highly enriched uranium] production exists elsewhere."

Kim told reporters the government "continues to try to verify" intelligence reports about the matter.