Moscow (CNN) -- Former Soviet spy Leonid Shebarshin, who was very briefly head of the KGB, was found dead Friday in his apartment in Moscow, an apparent suicide, officials said. The 76-year-old left a suicide note, the state-run news agency Itar-Tass reported Friday, citing city police. A weapon was found near the body, Investigation Committee spokesman Vladimir Markin said. The contents of the note were not disclosed "in the interest of the investigation," according to police, the news agency said. Shebarshin was alone in the apartment, it added.