Brazil ? Inmates on Thursday ended a rebellion that left nine people dead at an overcrowded Brazilian prison, after authorities agreed to improve conditions.

During the height of the five-day takeover, rioters carried out revenge killings in which at least one victim was decapitated and another hacked to death, officials said.

Seven other inmates died and scores of visitors were prevented from leaving during the uprising at Urso Branco State Prison in state capital of Porto Velho, some 1,500 miles northwest of Sao Paulo, Brazil’s largest city.

The riot was sparked by a clash between gangs Sunday. As the fighting mushroomed, about 1,000 inmates quickly assumed control of the prison, which was built to hold 350.

Authorities agreed to replace the prison director, give prisoners the right to visits from their children, provide more recreation space and give inmates more frequent dental care.