Ten people were injured at Pitchess Detention Center in Castaic in an altercation involving deputies and men incarcerated at the center’s maximum security jail, authorities said.

Los Angeles County fire paramedics responded to the facility at 29340 The Old Road around 3:11 p.m. and were assessing multiple patients at the facility, said Inspector Sean Ferguson, spokesperson for the county fire department.

Seven deputies, one custody assistant, and two inmates suffered injuries, the Sheriff’s Department said in a statement. Six of those deputies and the two inmates were transported to a local hospital with non-life threatening injuries.

The altercation began when a deputy doing security check was assaulted by an individual incarcerated at the center’s North County Correctional Facility, an all-male maximum security jail, the Sheriff’s Department said. Other inmates in the dormitory-style part of the facility joined the altercation, drawing more deputies into the area.

During the altercation, deputies used pepper spray on inmates, exposing 20 to 25 individuals to the chemical, the department said.

The detention facility where the incident took place — North County Detention Facility — is one of several county jails in the Pitchess Detention Center, which also includes two medium security facilities, said Sheriff’s Deputy Shawn Dubusky, spokesperson for the department. North County Facility, located just north of Santa Clarita, off the 5 Freeway, has a bed capacity of 4,295 people and jails people in separate dormitory modules.

The facility remained on lockdown into Thursday evening, authorities said.