Nuclear security

N. Korea preparing 5th nuclear test - S. Korea spy agency

North Korea is preparing for its fifth nuclear test, the South's intelligence services have said, as cited by Yonhap agency. The news come hours after Pyongyang claimed it had successfully put an earth observation satellite into orbit.

Earlier the agency reported that the South Korean military found suspected fragments of the North’s rocket.

The metal object believed to be a part of the rocket's fairing (the nose cone which houses the payload) was discovered southeast of South Korea's Jeju Island by a navy ship, an official from the country's Defense Ministry said.