The Royal Malaysian Police (RMP) said the chemical weapon VX was the toxin used in last week's assassination of Kim Jong Nam, the estranged half-brother of Kim Jong Un, in a statement released on Friday morning.

VX, also known by its full name N-2-Diisopropylamino Ethyl Methylphosphonothioate, is a highly toxic substance which is odorless and tasteless. 10 milligrams is said to be sufficient for it to be fatal through skin contact.