The Democratic People's Republic of Korea's state news agency says Pyongyang has successfully tested a solid-fuel rocket engine. KCNA said this has increased the power of the country's ballistic rockets.
Pyongyang also claimed last week it had conducted a successful simulated test of the atmospheric re-entry of a ballistic missile. The country had previously launched long-range rockets using liquid fuel, but it was seen as lacking the capability to build solid-fuel long-range or intercontinental missiles.
Many experts believe the DPRK is a decade or more away from building an intercontinental ballistic missile.