TDCJ released the names of the five inmates:
Michael Dueitt, 27, convicted in Calhoun County and serving a life sentence for capital murder
Juan Quintero,36, convicted in Harris Count and serving a life without parole sentence for capital murder
Donald Gower, 41, convicted in Lampass County and serving a life without parole sentence for capital murder
Terry McDonald, 29, convicted in El Paso County and serving a life sentence for murder
Albin Zelaya-Zelaya, 29, convicted in Harris County and serving a life sentence for burglary with intent to commit a felony
Quintero and Gowen suffered multiple lacerations. They have since been treated for their injuries and are back at the unit.
Dueitt, Zelaya-Zelaya, and McDonald suffered gunshot wounds and were taken to area hospitals for non-life threatening injuries.
Quintero, an illegal immigrant, was convicted in 2008 of murdering HPD officer Rodney Johnson in 2006.
All five offenders could face felony attempted escape charges.