At least 10 prisoners have been killed in fighting between rival gangs at the largest prison in the north-eastern Brazilian city of Natal. It took 14 hours for police to regain control of Alcacuz jail. This is the third major riot in Brazil this year. Nearly 100 inmates died in riots earlier this month in prisons in the states of Amazonas and Roraima.<br/><br/>The violence inside Alcacuz jail, in Rio Grande Do Norte state, began yesterday afternoon, when members of one of the powerful criminal organisations present in most Brazilian jails attacked rivals in a separate wing.