Sanna Riitta Liisa Sillanpää (born 15 April 1968) is a Finnish woman who shot three men to death with a rented 9mm Beretta 92FS semi-automatic pistol on 21 February 1999 in a in , Helsinki, and wounded another man, who received lifetime injuries. One man present was not harmed. One of the dead was the shooting club's 23-year-old supervisor.