Authorities believe carbon monoxide poisoning caused the deaths of three people found in a western Pennsylvania home this week, but investigators have yet to determine what led to the deadly exposure.

Three people are dead and two others were hospitalized after a possible carbon monoxide poisoning at a home in the city of ...

Three people were found dead in a home in Butler County due to suspected carbon monoxide poisoning, authorities said. First ...

Three found dead in a western Pennsylvania home apparently died from carbon monoxide poisoning — just the latest deaths this winter linked to the deadly, odorless gas.

The Butler County Coroner’s Office reports two men and a woman were found dead shortly before 5 p.m. Tuesday at the home in ...