FLAGSTAFF, Ariz. (AP) — A resident of northern Arizona has died from pneumonic plague, health officials said Friday. Plague is rare to humans, with on average about seven cases reported annually in the U.S., most of them in the western states, according to federal health officials.

A person in northern Arizona has died from a case of pneumonic plague, local health officials said. The unidentified patient, from Coconino County, showed up to the Flagstaff Medical Center Emergency Department and died there the same day, Northern Arizona Healthcare said in a statement. It is unclear when the death occurred.