The launch happened hours after South Korean and U.S. troops kicked off their large annual combined drills, which the North views as an invasion rehearsal.
According to a pro-Kremlin blogger, Russian operatives walked about 9 miles inside the pipeline that Moscow had until recently used to send gas to Europe.
South Korean and U.S. militaries halted all live-fire exercises across South Korea after South Korean jets mistakenly released bombs on a civilian area.
The handheld device will reportedly be able to test blood or fluid samples on future battlefields without needing refrigeration or temperature control.
The ban aims to protect the country’s “national sovereignty and security," and it follows US tariffs against Beijing, according to the Chinese government.