SANTA FE, N.M. (AP) — Authorities revealed Friday that actor Gene Hackman died of heart disease and showed severe signs of Alzheimer’s disease a full week after his wife died of hantavirus in their home.

Authorities initially ruled out foul play after the bodies were discovered Feb 26. Immediate tests for carbon monoxide poisoning were negative.

Arakawa, 65, was found with an open prescription bottle and pills scattered on the bathroom counter. Authorities linked her death to hantavirus pulmonary syndrome.

Hackman, 95, was found in the home’s entryway. His death was tied to heart disease with Alzheimer’s disease contributing.

Hantavirus is a rare but potentially fatal disease spread by infected rodent droppings. It is typically reported in spring and summer, often due to exposures that occur when people are near mouse droppings in homes, sheds or poorly ventilated areas.

Santa Fe County Sheriff Adan Mendoza made the announcement alongside state fire and health officials at a news conference.

Investigators earlier retrieved personal items from the couple’s home, including a monthly planner and two cellphones.