The injured included two nurses.

Officers rushed to the scene and were clearing the hospital. The three victims were taken to a nearby trauma center with unspecified injuries and remain in critical condition, the Los Angeles Fire Department told Fox News.

Hospital authorities, where they are undergoing treatment, said their condition has improved.

"Dignity Health Northridge Hospital Medical Center received three patients to our Level II Trauma Center suffering stab wounds from the incident at Encino Hospital Medical Center," a statement from Dignity Health Northridge Hospital said. "All three patients are currently listed in stable condition."