Brazil prisoners beheaded in riot at Natal prison

Summary
This news talks about some incidents that happened in Alcacuz prison, Brazil. There has been a lot of fights in that prison, and in one of them 10 prisoners have been killed. Everything started when members of one of the most powerful criminal gangs went to the prison to attack their rivals, and three prisoners ended without his head.
There was no escapes from the prison but police says that the number of deaths could increase.
After this riot, the government wants to build safer prisons.
Personal opinion
I think that if the prisons were more safer this wouldn't happened.Also, all the people who has done that should be in jail.
http://www.bbc.com/news/world-latin-america-38626821