Photo gallery: North Korea says it has conducted third nuke test

PYONGYANG, North Korea (AP) - North Korea says it has tested a "miniaturised" nuclear device in defiance of U.N. orders to stop building atomic weapons.

Official state media reported on Tuesday that it was conducted in a safe manner.

This third nuclear test could take North Korea closer to its goal of building a nuclear warhead small enough to be mounted on a long-range missile.