Nigeria is home to a substantial network of organised crime, active especially in drug trafficking, shipping heroin from Asian countries to Europe and America; and cocaine from South America to Europe and South Africa. Various Nigerian confraternities or student "campus cults" are active in both organised crime and political violence as well as providing a network of corruption within Nigeria. As confraternities have extensive connections with political and military figures, they offer excellent alumni networking opportunities. The Supreme Vikings Confraternity, for example, boasts that twelve members of the Rivers State House of Assembly are cult members. In lower levels of society, there are the "area boys", organised gangs mostly active in Lagos who specialise in a mugging and small-scale drug dealing. Gang violence in Lagos resulted in 273 civilians and 84 policemen being killed from August 2000 to May 2001.