A fire at the jail of a courthouse in Costa Rica was reportedly set by eight men with ties to a Mexican drug cartel.

Saturday, jail cell mattresses at the courthouse, the Tribunales de Goicoechea in San Jose, were set on fire by eight men looking to start a mutiny as part of their plan to escape.

The men are believed to have ties to Mexico’s Gulf Cartel. Prisoner Juan Manuel “El Guero” Hernandez had been arrested earlier in the week and was believed to the be the leader of a Costa Rican drug trafficking operation with ties to a Mexican counterpart with e the Gulf Cartel.

The mattresses, 15 total, were ignited using a lighter investigators believe was smuggled into the jail by a prisoner who likely brought it in inside his body.

Of the eight men who started the fires, five are Mexican and are believed to be members of the Mexican cartel.

El Guero is now being held in La Reforma prison’s maximum security block.