(CNN) Cairo’s main square Saturday overflowed with people angry that six former government aides were acquitted of charges of killing hundreds of pro-democracy protesters last year, while former strongman Hosni Mubarak was ordered to prison.

Mubarak and former Interior Minister Habib El Adly were sentenced to life in prison for their crimes. Mubarak was immediately transferred to a prison in southern Cairo to serve his sentence, and a prosecutor said the former president, who attended court on a gurney, would be transferred to the prison hospital.

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