Dutch military intelligence service MIVD prevented a hacking operation by Russian secret service G.U. aimed at the Organization for the Prohibition of Chemical Weapons (OPWC), Minister Ank Bijleveld of Defense announced at a press conference in The Hague on Thursday. The G.U. tried to hack the OPWC on April 13th. Four involved Russian officers were deported from the Netherlands that same day, NOS reports.