UPDATE: Carbon monoxide killed 2 including SW Kan. man in SUV outside Wal-Mart

2 dead from carbon monoxide poisoning- photo courtesy KCTV

KANSAS CITY, Kan. (AP) — Authorities say carbon monoxide poisoning killed two people who were found dead in a sport utility vehicle in a Wal-Mart parking lot in Kansas City, Kansas.

The victims identified by police Wednesday as Trevor B. Roth, 30, Dodge City and Carolyn Williams-Cottier, 26, Kansas City, were found dead in the vehicle.

Police say an autopsy determined that their deaths were accidental. But an investigation is ongoing. Anyone with information is urged to call police or a tips hotline.

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Police Chief Terry Zeigler announced the cause of death Tuesday on Twitter. The names of the two people who died weren’t immediately released. They were found Sunday morning in the parking lot across the streets from the Legends Outlets shopping center near the Kansas Speedway.

The 2 individuals we found in the parking lot of Walmart died from carbon monoxide poisoning. https://t.co/oXYtpJr5Qu

— Terry Zeigler (@KCKPDChief) April 25, 2017

Zeigler said in a later tweet that he wasn’t sure what caused the carbon monoxide levels to reach lethal levels. He said “an exhaust issue” was a possibility.