According to Stratfor,
Shooting and intermittent explosions began in the prison at 7:55 a.m. Two members of the Bolivarian National Intelligence Service entered the building, and guards launched tear gas into the prison. According to Ultimas Noticias, the Venezuelan National Guard seized the area around the prison because unidentified people from the neighborhood were firing upon El Paraiso. Two missiles reportedly fired from the prison hit Villasmil Center.
It would be very interesting to know if Iran in any way shape or form was involved with this particular series of events. Why are there missiles inside a Prison? Why fired towards the outside?