Authorities are searching for Aniah Haley Blanchard, a college student and stepdaughter of Ultimate Fighting Championship heavyweight Walt Harris, who has been missing since Oct. 23.

The teenager's family reported her missing in Auburn, Alabama. The Auburn Police Division, in partnership with the Montgomery Police Department, released video showing her in a convenience store on South College Street in Auburn on Oct. 23. Harris has made a public plea for help in searching for Blanchard on his Twitter page.

Earlier, police announced the teen’s abandoned and damaged car had been discovered at an apartment complex in Montgomery about 55 miles away. The vehicle wasn’t damaged prior to Blanchard’s disappearance.

Police have said foul play didn’t appear to be a factor in Blanchard’s disappearance.

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Credit: Courtesy of Auburn Police Department

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Credit: Courtesy of Auburn Police Department

Blanchard's mother, Angela Haley-Harris, told WBRC-TV that Blanchard was with someone when last contacted by phone Wednesday night. That person's connection to Blanchard is unclear.

Harris has posted pleas for help on Twitter and Instagram.

Police are imploring anyone with information about Blanchard’s whereabouts or details about the possible car collision to contact the Auburn Police Division Detective Section at 334-501-3140 or the anonymous tip line at 334-246-1391.

The Associated Press contributed to this report.