North Korea's threat to Obama ridicules strengthen sanctions for nuclear test

North Korea on Sunday called "laughable" US efforts to expand sanctions following its fifth nuclear test explosions and promised to build the atomic potential.

This week, seismologists around the world recorded a strong earthquake in North Korea caused the strongest in its history, a nuclear explosion, whose power exceeds the power of the bomb dropped on Hiroshima.

"The way Obama still worn and rants about meaningless sanctions, just like laughter"- said in a statement, the North Korean Foreign Ministry, which has spread Korean Central News Agency.

Key countries involved in talks on security on the Korean Peninsula, Pyongyang condemned the move, calling it yet another challenge to the United Nations sanctions regime. US President Baraka Obamy administration has warned that could unilaterally impose sanctions on North Korea.

Neighbors concerned about North Korea's statement that it has developed a miniature warhead for ballistic missiles.

"We have clearly given to understand that aimed at strengthening our national nuclear power in qualitative and quantitative terms, measures will be continued - for the sake of defending our dignity and the right to life in the face of the growing threat of nuclear war that provoked the US"- North Korean Foreign Ministry said.