context: The Saint Valentine's Day Massacre is the name given to the 1929 Valentine's Day murder of seven members and associates of Chicago's North Side Gang. The men were gathered at a Lincoln Park garage on the morning of Valentine's Day, where they were made to line up against a wall and shot by four unknown assailants. The incident resulted from the struggle between the Irish North Siders and their Italian South Side rivals, led by Al Capone, to control organized crime in the city during Prohibition.[1] Though the perpetrators have not been conclusively identified, former members of the Egan's Rats gang, working for Capone, are suspected of a significant role as are members of the Chicago Police Department who are said to have had personal revenge as their motive following the killing of a police officer's son.
question: What party committed the massacre for the Valentine's Day incident?
answers.text: the perpetrators have not been conclusively identified Italian South Side rivals, led by Al Capone