The AP reports:
North Korea conducted a nuclear test at an underground site in the remote northeast Tuesday, taking an important step toward its goal of building a bomb small enough to be fitted on a missile that could reach United States.
North Korea made clear that the explosion of its third atomic device - which it claimed was smaller than the ones in its previous two tests - was a warning to what it considers a hostile United States. Its actions drew immediate condemnation from Washington, the U.N. and others. Even its only major ally, China, voiced opposition.
"The test was conducted in a safe and perfect way on a high level, with the use of a smaller and light A-bomb, unlike the previous ones, yet with great explosive power," North Korea's official Korean Central News Agency said.