Three people died and two others were injured after a possible carbon monoxide leak at a home in Butler. First responders were called to the house on College Street around 5 p.m. Monday.

“Basically, it causes an internal suffocation when you have carbon monoxide poisoning and can be deadly,” she told News 2. According to Bruccoleri, CO poisoning becomes more prevalent during the winter due to the increased use of supplemental heating devices, like space heaters, furnaces, and generators.

Winter storms bring freezing temperatures and power outages — conditions that can significantly increase the risk of carbon monoxide poisoning.

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 were found dead in a home in Butler County due to suspected carbon monoxide poisoning, authorities said. First responders were called to a home on College Street in Butler at around 5 p.m.

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