FALLS CHURCH, Va. (AP) — Police say a northern Virginia sheriff’s deputy fatally shot a hospital patient who they say was wielding a metal sign post and appeared to be mentally disturbed.

Fairfax County Police Chief Edwin Roessler and Sheriff Stacey Kincaid released details about the Monday night shooting at a news conference Tuesday.

Roessler says a 29-year-old Hispanic man had just been discharged from Inova Fairfax Hospital when he began wielding a sign post with a sharp metal end. Roessler said a hospital security guard was injured before a sheriff’s deputy responded.

Roessler says the deputy, an 18-year veteran, tried to talk the man down, but he continued to charge at the deputy until he fired multiple shots. Roessler didn’t identify either the patient or the deputy, who is on administrative leave. He also did not release the deputy’s race.

The deputy had been guarding another patient at the hospital when he responded. In Virginia, deputies hold the same authority as police in responding to incidents.