Two Santa Clara Sheriff's correctional deputies were injured after they were attacked at the county jail.
It happened at the main jail in San Jose Sunday night.
Source said that’s when at least one or more jail trustees attacked the guards with handmade shanks.
Trustees are incarcerated people who have more freedom to move around the jail due to good behavior.
Get a weekly recap of the latest San Francisco Bay Area housing news. Sign up for NBC Bay Area’s Housing Deconstructed newsletter.
The attacker or attackers were allegedly upset that their privileges were going to be taken away.
The deputies sustained puncture wounds and defensive injuries.
No word on their condition.