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Oliver Hotham
Oliver Hotham was an NK News contributor based in Seoul, South Korea. Follow him on Twitter.
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.