Around 60 killed as drug gangs clash in Brazil prison massacre - West Central Tribune

BRASILIA--Around 60 people were killed in a bloody prison riot in the jungle city of Manaus sparked by a war between rival drug gangs, officials said Monday, in the worst violence in over two decades in Brazil's overcrowded penitentiary sy

Why the Brazil Prison Massacre Was a 'Tragedy Foretold' - The New York Times

A problem from hell': More than 100 inmates have been killed by gang violence in Brazilian prisons

Brazil: Scores of inmates killed in grisly prison riot, many of them beheaded

Grisly gang massacres sweep Brazil's prisons. 100 inmates killed in recent weeks. - The Washington Post

Grisly gang massacres sweep Brazil's prisons. 100 inmates killed in recent weeks. - The Washington Post

Mexican drug war - Wikipedia

A World of Gangs Armed Young Men and Gangsta Culture (Globalization and Community), PDF, Gang

Gangs Clash Inside Brazil Prison Where 26 Massacred This Week

Brazil jail riot in Para state leaves 57 dead as gangs fight - BBC News

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Police Break Up Another Drug Gang Clash in Brazilian Prison

Brazil gang at center of prison killings gets power in jails

CRIME & JUSTICE - IPS Inter Press Service