Noble 's endorsement of the Belorussian state investigation into the April 2011 bomb explosion in the Minsk Metro was questioned in 2012 by BBC journalist John Sweeney . In a May 2011 press conference in Minsk , Noble praised the " high professionalism " of the police , Ministry of Internal Affairs officials , and other government officials for quickly completing the investigation . According to Sweeney , Noble endorsed the CCTV footage used in the investigation , the credibility of which was later questioned . Interpol said the BBC documentary was based on " biased speculation "
April 2011 bomb explosion in the Minsk Metro
2011 Minsk Metro bombing
Ronald Noble