Vladimir Kramnik denies wrongdoing in death of US chess star Daniel Naroditsky

• Police probing Naroditsky death as possible suicide

• Kramnik denies blame, claims harassment campaign

• Fide to review ex-champion's conduct after tragedy

Vladimir Kramnik has broken his silence following the death of American grandmaster Daniel Naroditsky, calling the 29-year-old's passing a tragedy while accusing critics of mounting an unprecedentedly cynical and unlawful campaign of harassment" against him and his family.

The 50-year-old former world champion, who has faced widespread condemnation for accusing Naroditsky of online cheating without evidence, expressed condolences but denied any personal attacks.