Authorities say BMW’s GPS information last rented GPS information showed the trio on Interstate 40 in Williams, Arizona. The city is about 35 minutes west of Flagstaff and is also known as the gateway to Grand Canyon National Park.

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Police confirmed that fatal stakes involving 22 vehicles had been created in the same location, with several vehicles not recognised during that time. Officers said they were not sure if the missing trio was involved in the crash. But Coconino Sheriff’s spokesman John Paxton told ABC News on Friday it was “possible.”

The crash occurred in a winter storm on westbound Interstate 40 near Milepost 159.5 in Williams, Arizona. Several vehicles were on fire, some of which had been burning in “extreme temperatures” on snow and ice-covered roads for more than 20 hours, the Arizona Department of Public Safety told CNN.

According to release “The crash initially blocked a westbound I-40 in an area with guardrails on either side, including a jackknife tractor trailer, completely obstructing the interstate. The tractor trailer below it crashed.”

The release added that the collision includes 22 vehicles, including 13 passenger cars. “A total of 36 drivers and residents, including two deaths, were involved in the incident, with 16 injured people being transported for medical care,” he said.

The two who died were identified as Juan Bertran Sanchez of Chino Valley, Arizona, and Evelyn Davis of Ganado, Arizona.

The South Korean consulate contacted Arizona authorities last week after the family missed home from San Francisco. The Sheriff’s Office searched the area, service roads and hospitals for three days. They say now they’ve exhausted all their leads.