North Korea has up to 60 nuclear bombs, Seoul says
Estimates on the size of the isolated nation's nuclear arsenal range from 20 bombs to as many as 60, the South's unification minister Cho Myoung-gyon told parliament.
It is the first time a senior Seoul official has publicly spoken about the size of the North's secretive haul of weapons.
Mr Cho said the information came from the intelligence authorities.
However, he said this did not mean South Korea would accept North Korea as a nuclear state, suggesting Seoul's diplomatic efforts to halt the North's nuclear programme would continue.
According to South Korean government reports, the North is believed to have produced 50kg (110lbs) of weaponised plutonium, enough for at least eight nuclear bombs.
South Korea's main spy agency, the National Intelligence Service, did not comment immediately.
As denuclearisation talks between the US and North Korea continue to stall, Pyongyang has warned Washington that it cannot use a declaration to end the Korean War as a bargaining chip