SEOUL — A top South Korean official told lawmakers that North Korea is estimated to have up to 60 nuclear weapons, in Seoul’s first public comment about the size of the North’s secrecy-clouded weapons arsenal.

Unification Minister Cho Myoung-gyon told parliament Monday the estimates on the size of North Korea’s nuclear arsenal range from 20 bombs to as many as 60. He was responding to a question by a lawmaker, saying the information came from the intelligence authorities. The National Intelligence Service, South Korea’s main spy agency, couldn’t immediately comment.

Cho may have unintentionally revealed the information. His ministry said Tuesday Cho’s comments didn’t mean that South Korea would accept North Korea as a nuclear state, suggesting Seoul’s diplomatic efforts to rid the North of its nuclear program would continue.