This morning, police are investigating what caused a massive jail fight at the Lerdo Jail. 

The fight broke out sometime between 8:00 p.m. and 8:30 p.m. last night. 

75 inmates were involved, 10 were injured and five were taken to Kern Medical for treatment.

Officials said their primary focus was securing inmates and the facility.

None of the staff members were hurt in the process.