Fears of Beijing intervening in the Hong Kong anti-extradition bill protests were raised Monday after footage emerged showing several armored trucks belonging to China’s People’s Armed Police traveling through Shenzhen, which borders the autonomous city.

New missile technologies, including so-called hypersonic systems capable of traveling at more than 25 times the speed of sound, are fueling a new global arms race, according to a new report from analyst group the European Leadership Network.

Russia’s chief nuclear official has vowed to continue developing new weapons while attending a funeral on August 12 of five Russian nuclear researchers who were killed in an explosion in what U.S. experts suspect was a mishandled test of a new nuclear-powered engine.