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.

Poor ventilation also increases the risk for carbon monoxide poisoning. "In the winter everybody closes everything up to keep the cold air out which keeps the CO inside," Taylor said.

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

As the dreaded winter storm approaches, North Texans need to stay on alert for a silent killer: carbon monoxide poisoning.

"If you have a gas furnace, if you have a gas water heater, you know, you're heating your house with your fireplace, that's typically where you'll see that," said Jones. "So you can see carbon ...

ASPINWALL (KDKA) -- Carbon Monoxide can be a silent killer, especially in the winter when most exposures happen according to ...