Zambrano was assassinated on 28 December 2020 and as a result of the incident, several groups that were previously part of the gang split off and began to attack their former leaders.
[4] The clashes between the gangs began around 9:30 in the morning of 28 September, when the first detonations of explosives were heard inside the jail and it was decided to evacuate the administrative personnel working there.
[5] Members of the Los Tiguerones gang also attacked inmates in pavilions 1 and 3 and beheaded five of them.
During the entry, the security forces found improvised checkpoints built by the inmates and holes in several walls used by the attackers to enter other pavilions in search of victims.
Reuters and Swissinfo reported 68 prisoners were killed[11] and over a dozen were seriously injured during this riot.