Cemetery Zacatecas

I have been looking for the death years of my Grandfather Ventura Rojas and his
father-in-law, Leonardo Betancourt. They were both killed on the same day.
Probably between 1913 to 1918.
I was told they are buried in the old Cemetery in CuevaGrandeZacatecas. Does
anyone know the name of that cemetery? Any assistance would be appreciated.