Police found a substance with which was killed Kim Jong-Nam, the brother of North Korean leader Kim Jong-Un.
According to RIA Novosti , the substance is called VX Nerve Agent, which is a chemical weapon.
The Malaysian police in turn stated that Kim Jong-Nam was poisoned.
Note that VX is added to the types of chemical weapons by the Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on Their Destruction of 1997.