The Comprehensive Test-Ban Treaty, which the UN adopted in 1996, bans all nuclear tests worldwide whether for civilian or military purposes.
The agreement represents an important step toward closer co-operation taken by Central Asian countries, observers say.
Moscow has consistently attempted to impede investigations of chemical weapon use to protect its ally Syria.
One of the riot leaders was the son of Gulmurod Khalimov, Central Asia's highest-ranking defector to the 'Islamic State'.
The fight against unregistered weapons helps reduce crime and prevent terrorism.
Kazakhstan's military spending in the first two months of 2019 has climbed 73% compared to the same period last year.
The cease-fire Russia negotiated in Idlib has facilitated al-Qaeda's consolidation of influence and territory.
The Uzbek government is continuing to reform and modernise its military.
A Russian doctor was among the dead killed by Afghan forces, while up to five Russian advisors were also present in the area.
The two nations took steps toward better security in Central Asia during Kazakh President Kassym-Zhomart Tokayev’s official visit to Uzbekistan April 14-15.