Inmates taking hostages on roof of a prison
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Brazil prison riot: Five killed in Cascavel protest

Police in Brazil say rioters in a jail in the southern city of Cascavel have killed five fellow inmates and injured several others.

At least 700 prisoners are reported to be involved in the uprising, which began on Sunday morning.

The prisoners are said to be unhappy about how the prison is run, as well as about food and hygiene there.

The BBC's Wyre Davies says the prisons are effectively run by gangs and are "beyond the reach of the law".

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