A battle between gangs in a prison killed at least 116 people and injured 80 in what authorities are calling the worst penitentiary massacre in Ecuador’s history. At least five dead were reported beheaded, officials said Wednesday.

President Guillermo Lasso decreed a state of emergency in Ecuador’s prison system, allowing the government to deploy the police and soldiers to penitentiaries among other powers. Authorities attributed Tuesday’s bloodshed at the Litoral penitentiary in the coastal city of Guayaquil to gangs linked to international drug cartels fighting for control of the lockup.

Lasso, visibly affected, said at a news conference that what was happening in the Guayaquil prison was “bad and sad” and he could not for the moment guarantee that authorities had regained control of the lockup.

“It is regrettable that the prisons are being turned into territories for power disputes by criminal gangs,” he said, adding that he would act with “absolute firmness” to regain control of the Litoral prison and prevent the violence from spreading to other penitentiaries.