Kim Jong Un ordered the production of “more” solid-fuel engines and warhead tips for intercontinental ballistic missiles (ICBM) during a recent visit to the Chemical Material Institute of the Academy of Defense Science, the state-run Korean Central News Agency (KCNA) reported on Wednesday.

“He instructed the institute to produce more solid-fuel rocket engines and rocket warhead tips,” KCNA said in a Korean language dispatch.

Kim ordered the scientists to “further expand” production capacities for developing rocket warhead tips and engine outlets.

The institute produces chemical materials “used in a variety of modern arms equipment, including heat protection materials and materials for