Two nursing employees were injured at Atascadero State Hospital on Wednesday night during an aggressive incident by a patient.
Michael Anthony Lopez, 24, was booked into San Luis Obispo County Jail early Thursday on suspicion of assault with great bodily injury following the 8:15 p.m. attack.
One employee is being treated at a local hospital. No further details were released.
Violent acts by patients are not uncommon at the psychiatric facility for men who have committed or are accused of crimes.
Staff names are not released and job titles remain general in attack reports to protect the identity of employees, officials said. Patients' names and injuries are not given because of federal law.