Jewish and Italian crime groups became increasingly interconnected in the 1920s and 1930s, as they often occupied the same neighborhoods and social statuses of the time. The two ethnic crime groups became especially close in New York City following the establishment of the close relationship between partners Lucky Luciano and Meyer Lansky and their subsequent elimination of many of the so-called "Mustache Pete" types ⁠— Sicilian-born gangsters who often refused to work with non-Italians and even non-Sicilians. The Cohen crime family of Los Angeles and Las Vegas was notably part of both the Jewish Mafia and Italian-American Mafia, and lines between the two ethnic criminal organizations often blurred throughout the 20th century.