CHINO VALLEY (AP) — A wildfire sparked on the grounds of a state prison in Southern California, but corrections officials say it is not a threat to inmates or the community.READ MORE: Protests Continue Outside Sigma Nu House On USC's Fraternity Row As New Sexual Assault Allegations Emerge
The fire started after noon Friday in a field next to the California Institution for Men in Chino, 36 miles east of Los Angeles. It had burned about 30 acres on the 2,500-acre prison grounds by late afternoon.READ MORE: Lawmaker Calls For Change On California Film Sets After Prop-Gun Shooting Death Of Halyna Hutchins By Alec Baldwin
Firefighters from four agencies were attacking the blaze, which was about 60 percent contained by late Friday evening.
There were no reported injuries or damage to property. No evacuations have been made. The prison’s nearly 5,000 inmates were locked in their cells as a precaution.MORE NEWS: Inland Empire Commuters Dealing With Wet And Dangerous Road Conditions
Officials say they preliminarily believe the fire was started by a mechanical malfunction in a prison vehicle being driven near dry vegetation.