18th Street, also known as Calle 18, Barrio 18, Mara 18, or simply La 18 in Central America, is a multi-ethnic (largely Central American and Mexican) transnational criminal organization that started as a street gang in Los Angeles. It is one of the largest transnational criminal gangs in Los Angeles, with 30,000 to 50,000 members between the United States, Mexico, and Central America and is also allied with the Mexican Mafia, another US-based crime organization. A United States Department of Justice report featured the following statement regarding 18th Street and rival gang MS-13, "These two gangs have turned the Central American northern triangle into the area with the highest homicide rate in the world."